WaMu 2007-HE1

Mortgage Pass-Through Certificates

March 26, 2007 Distribution

External Parties

Table of Contents

Page

Seller

1. Certificate Payment Report

Washington Mutual Bank

2. Collection Account Report

3. Credit Enhancement Report

Servicer(s)

4. Collateral Report

Washington Mutual Bank

5. Delinquency Report

6. REO Report

Underwriter(s)

7. Foreclosure Report

Bank of America,N.A

8. Prepayment Report

Wamu Capital Corp

9. Prepayment Detail Report

10. Realized Loss Report

Swap Counterparty

11. Realized Loss Detail Report

The Bank of New York

12. Triggers and Adj. Cert. Report

13. Additional Certificate Report

Total Number of Pages

Dates

Contacts

Cut-Off Date:

January 01, 2007

Manuel Rivas

Close Date:

January 16, 2007

Administrator

First Distribution Date:

February 26, 2007

(714) 247-6265

Manuel.Rivas@db.com

Address:

Distribution Date:

March 26, 2007

1761 E. St. Andrew Place, Santa Ana, CA 92705

Record Date:

February 28, 2007

Factor Information:

(800) 735-7777

March 23, 2007

Main Phone Number:

(714) 247-6000

Determination Date:

March 16, 2007

https://www.tss.db.com/invr

Page 1 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution

Certificate Payment Report
Current Period Distribution -
			Prior						Current
			Prior

	Class	Original	Principal			Total	Realized	Deferred	Principal

Class	Type	Face Value	Balance	Interest	Principal	Distribution	Loss	Interest	Balance
			(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)
I-A	FLT,STEP	368,226,000.00	365,083,152.52	1,553,225.99	2,218,499.11	3,771,725.10	0.00	0.00	362,864,653.41
I-A	FLT,STEP	368,226,000.00	365,083,152.52	1,553,225.99	2,218,499.11	3,771,725.10	0.00	0.00	362,864,653.41
II-A1	FLT,STEP	344,256,000.00	338,520,345.26	1,413,886.64	7,828,566.48	9,242,453.12	0.00	0.00	330,691,778.78
II-A2	FLT,STEP	105,486,000.00	105,486,000.00	445,502.54	0.00	445,502.54	0.00	0.00	105,486,000.00
II-A3	FLT,STEP	221,049,000.00	221,049,000.00	940,440.69	0.00	940,440.69	0.00	0.00	221,049,000.00
II-A4	FLT,STEP	74,625,000.00	74,625,000.00	322,131.25	0.00	322,131.25	0.00	0.00	74,625,000.00
M-1	MEZ,STEP,FL	47,359,000.00	47,359,000.00	204,801.36	0.00	204,801.36	0.00	0.00	47,359,000.00
M-2	MEZ,STEP,FL	41,813,000.00	41,813,000.00	182,118.84	0.00	182,118.84	0.00	0.00	41,813,000.00
M-3	MEZ,STEP,FL	26,513,000.00	26,513,000.00	116,303.69	0.00	116,303.69	0.00	0.00	26,513,000.00
M-4	MEZ,STEP,FL	22,998,000.00	22,998,000.00	101,778.93	0.00	101,778.93	0.00	0.00	22,998,000.00
M-5	MEZ,STEP,FL	21,604,000.00	21,604,000.00	96,113.80	0.00	96,113.80	0.00	0.00	21,604,000.00
M-6	MEZ,STEP,FL	20,907,000.00	20,907,000.00	93,988.58	0.00	93,988.58	0.00	0.00	20,907,000.00
M-7	MEZ,STEP,FL	18,816,000.00	18,816,000.00	91,027.63	0.00	91,027.63	0.00	0.00	18,816,000.00
M-8	MEZ,STEP,FL	9,060,000.00	9,060,000.00	48,762.93	0.00	48,762.93	0.00	0.00	9,060,000.00
M-9	MEZ,STEP,FL	15,332,000.00	15,332,000.00	90,271.41	0.00	90,271.41	0.00	0.00	15,332,000.00
B-1	MEZ,STEP,FL	8,363,000.00	8,363,000.00	49,239.49	0.00	49,239.49	0.00	0.00	8,363,000.00
B-2	MEZ,STEP,FL	13,938,000.00	13,938,000.00	82,063.85	0.00	82,063.85	0.00	0.00	13,938,000.00
C	33,449,151.58	33,451,062.04	3,284,656.28	0.00	3,284,656.28	0.00	0.00	33,451,062.04
P	100.00	100.00	137,992.80	0.00	137,992.80	0.00	0.00	100.00
R	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
R-CX	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
R-PX	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00


Total		1,393,794,251.58	1,384,917,659.82	9,254,306.70	10,047,065.59	19,301,372.29	0.00	0.00	1,374,870,594.23
Total





Page 2 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution


Interest Accrual Detail Current Period Factor Information per $1,000 of Original Face Value
					Orig. Principal	Prior				Current
					Orig. Principal	Prior				Current
	Period	Period			(with Notional)	Principal			Total	Principal
Class	Starting	Ending	Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
			Method
					(1)	(1)	(2)	(3)	(4)=(2)+(3)	(5)

I-A	02/26/07	03/25/07	A-Act/360	933631AA1	368,226,000.00	991.464895	4.218132	6.024830	10.242962	985.440065
I-A	02/26/07	03/25/07	A-Act/360	933631AA1	368,226,000.00	991.464895	4.218132	6.024830	10.242962	985.440065
II-A1	02/26/07	03/25/07	A-Act/360	933631AB9	344,256,000.00	983.338984	4.107079	22.740538	26.847617	960.598446
II-A2	02/26/07	03/25/07	A-Act/360	933631AC7	105,486,000.00	1,000.000000	4.223333	0.000000	4.223333	1,000.000000
II-A3	02/26/07	03/25/07	A-Act/360	933631AD5	221,049,000.00	1,000.000000	4.254444	0.000000	4.254444	1,000.000000
II-A4	02/26/07	03/25/07	A-Act/360	933631AE3	74,625,000.00	1,000.000000	4.316667	0.000000	4.316667	1,000.000000
M-1	02/26/07	03/25/07	A-Act/360	933631AF0	47,359,000.00	1,000.000000	4.324444	0.000000	4.324444	1,000.000000
M-2	02/26/07	03/25/07	A-Act/360	933631AG8	41,813,000.00	1,000.000000	4.355555	0.000000	4.355555	1,000.000000
M-3	02/26/07	03/25/07	A-Act/360	933631AH6	26,513,000.00	1,000.000000	4.386667	0.000000	4.386667	1,000.000000
M-4	02/26/07	03/25/07	A-Act/360	933631AJ2	22,998,000.00	1,000.000000	4.425556	0.000000	4.425556	1,000.000000
M-5	02/26/07	03/25/07	A-Act/360	933631AK9	21,604,000.00	1,000.000000	4.448889	0.000000	4.448889	1,000.000000
M-6	02/26/07	03/25/07	A-Act/360	933631AL7	20,907,000.00	1,000.000000	4.495556	0.000000	4.495556	1,000.000000
M-7	02/26/07	03/25/07	A-Act/360	933631AM5	18,816,000.00	1,000.000000	4.837778	0.000000	4.837778	1,000.000000
M-8	02/26/07	03/25/07	A-Act/360	933631AN3	9,060,000.00	1,000.000000	5.382222	0.000000	5.382222	1,000.000000
M-9	02/26/07	03/25/07	A-Act/360	933631AP8	15,332,000.00	1,000.000000	5.887778	0.000000	5.887778	1,000.000000
B-1	02/26/07	03/25/07	A-Act/360	933631AQ6	8,363,000.00	1,000.000000	5.887778	0.000000	5.887778	1,000.000000
B-2	02/26/07	03/25/07	A-Act/360	933631AR4	13,938,000.00	1,000.000000	5.887778	0.000000	5.887778	1,000.000000
C	02/25/07	03/24/07	F-30/360	WA07H1301	66,898,303.16	500.028558	49.099247	0.000000	49.099247	500.028558
P		WA07H1302	100.00	1,000.000000	1,379,928.000000	0.000000	1,379,928.000000	1,000.000000
R		WA07H1303	0.00	0.000000	0.000000	0.000000	0.000000	0.000000
R-CX		WA07H1304	0.00	0.000000	0.000000	0.000000	0.000000	0.000000
R-PX		WA07H1305	0.00	0.000000	0.000000	0.000000	0.000000	0.000000




Page 3 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution


Distribution to Date -
									Current


	Original		Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal

Class	Face Value	Interest	Principal	Principal	Principal	Distribution	Loss	Interest	Balance
(1)	(2)	(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)
I-A	368,226,000.00	3,847,171.69	5,008,641.52	352,705.07	5,361,346.59	9,208,518.28	0.00	0.00	362,864,653.41
II-A1	344,256,000.00	3,519,298.96	12,689,590.65	874,630.57	13,564,221.22	17,083,520.18	0.00	0.00	330,691,778.78
II-A2	105,486,000.00	1,097,845.55	0.00	0.00	0.00	1,097,845.55	0.00	0.00	105,486,000.00
II-A3	221,049,000.00	2,317,514.56	0.00	0.00	0.00	2,317,514.56	0.00	0.00	221,049,000.00
II-A4	74,625,000.00	793,823.44	0.00	0.00	0.00	793,823.44	0.00	0.00	74,625,000.00
M-1	47,359,000.00	504,689.07	0.00	0.00	0.00	504,689.07	0.00	0.00	47,359,000.00
M-2	41,813,000.00	448,792.86	0.00	0.00	0.00	448,792.86	0.00	0.00	41,813,000.00
M-3	26,513,000.00	286,605.53	0.00	0.00	0.00	286,605.53	0.00	0.00	26,513,000.00
M-4	22,998,000.00	250,812.36	0.00	0.00	0.00	250,812.36	0.00	0.00	22,998,000.00
M-5	21,604,000.00	236,851.86	0.00	0.00	0.00	236,851.86	0.00	0.00	21,604,000.00
M-6	20,907,000.00	231,614.71	0.00	0.00	0.00	231,614.71	0.00	0.00	20,907,000.00
M-7	18,816,000.00	224,318.09	0.00	0.00	0.00	224,318.09	0.00	0.00	18,816,000.00
M-8	9,060,000.00	120,165.79	0.00	0.00	0.00	120,165.79	0.00	0.00	9,060,000.00
M-9	15,332,000.00	222,454.54	0.00	0.00	0.00	222,454.54	0.00	0.00	15,332,000.00
B-1	8,363,000.00	121,340.16	0.00	0.00	0.00	121,340.16	0.00	0.00	8,363,000.00
B-2	13,938,000.00	202,228.77	0.00	0.00	0.00	202,228.77	0.00	0.00	13,938,000.00
C	33,449,151.58	3,572,706.36	0.00	0.00	0.00	3,572,706.36	0.00	1,910.46	33,451,062.04
P	100.00	156,430.80	0.00	0.00	0.00	156,430.80	0.00	0.00	100.00
R	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
R-CX	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
R-PX	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00

Total	1,393,794,251.58	18,154,665.10	17,698,232.17	1,227,335.64	18,925,567.81	37,080,232.91	0.00	1,910.46	1,374,870,594.23


Interest Detail -
	Pass	Prior Principal		Non-	Prior	Unscheduled		Paid or	Current
	Pass	Prior Principal		Non-	Prior	Unscheduled		Paid or

	Through	(with Notional)	Accrued	Supported	Unpaid	Interest	Optimal	Deferred	Unpaid

Class	Rate	Balance	Interest	Interest SF	Interest	Adjustment	Interest	Interest	Interest
			(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)
I-A	5.47000%	365,083,152.52	1,553,225.99	0.00	0.00	0.00	1,553,225.99	1,553,225.99	0.00
II-A1	5.37000%	338,520,345.26	1,413,886.64	0.00	0.00	0.00	1,413,886.64	1,413,886.64	0.00
II-A2	5.43000%	105,486,000.00	445,502.54	0.00	0.00	0.00	445,502.54	445,502.54	0.00
II-A3	5.47000%	221,049,000.00	940,440.69	0.00	0.00	0.00	940,440.69	940,440.69	0.00
II-A4	5.55000%	74,625,000.00	322,131.25	0.00	0.00	0.00	322,131.25	322,131.25	0.00
M-1	5.56000%	47,359,000.00	204,801.36	0.00	0.00	0.00	204,801.36	204,801.36	0.00
M-2	5.60000%	41,813,000.00	182,118.84	0.00	0.00	0.00	182,118.84	182,118.84	0.00
M-3	5.64000%	26,513,000.00	116,303.69	0.00	0.00	0.00	116,303.69	116,303.69	0.00
M-4	5.69000%	22,998,000.00	101,778.93	0.00	0.00	0.00	101,778.93	101,778.93	0.00
M-5	5.72000%	21,604,000.00	96,113.80	0.00	0.00	0.00	96,113.80	96,113.80	0.00
M-6	5.78000%	20,907,000.00	93,988.58	0.00	0.00	0.00	93,988.58	93,988.58	0.00
M-7	6.22000%	18,816,000.00	91,027.63	0.00	0.00	0.00	91,027.63	91,027.63	0.00
M-8	6.92000%	9,060,000.00	48,762.93	0.00	0.00	0.00	48,762.93	48,762.93	0.00
M-9	7.57000%	15,332,000.00	90,271.41	0.00	0.00	0.00	90,271.41	90,271.41	0.00
B-1	7.57000%	8,363,000.00	49,239.49	0.00	0.00	0.00	49,239.49	49,239.49	0.00
B-2	7.57000%	13,938,000.00	82,063.85	0.00	0.00	0.00	82,063.85	82,063.85	0.00
C	117.83146%	33,451,062.04	0.00	0.00	0.00	0.00	0.00	3,284,656.28	0.00
P	0.00000%	100.00	0.00	0.00	0.00	0.00	0.00	137,992.80	0.00
R	0.00000%	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
R-CX	0.00000%	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
R-PX	0.00000%	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00


Total		1,384,917,659.82	5,831,657.62	0.00	0.00	0.00	5,831,657.62	9,254,306.70	0.00



Page 4 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution

Collection Account Report
SUMMARY

	Group 2	Group 1	Total
Principal Collections	7,828,566.48	2,218,499.11	10,047,065.59
Principal Withdrawals	0.00	0.00	0.00
Principal Other Accounts	0.00	0.00	0.00
TOTAL NET PRINCIPAL	7,828,566.48	2,218,499.11	10,047,065.59
Interest Collections	5,999,856.53	2,886,371.94	8,886,228.47
Interest Withdrawals	-0.00	-0.00	-0.00
Interest Fees	-42,126.15	-23,273.99	-65,400.14
Interest Other Accounts	84,345.30	53,647.50	433,478.37
TOTAL NET INTEREST	6,042,075.68	2,916,745.45	9,254,306.70
TOTAL AVAILABLE FUNDS FOR DISTRIBUTION	13,870,642.16	5,135,244.56	19,301,372.29




PRINCIPAL - COLLECTIONS

	Group 2	Group 1	Total
Scheduled Principal Received	382,211.30	231,665.96	613,877.26
Curtailments	13,133.16	16,767.00	29,900.16
Prepayments In Full	7,181,512.21	1,970,066.15	9,151,578.36
Repurchased/Substitutions	251,709.81	0.00	251,709.81
Liquidations	0.00	0.00	0.00
Insurance Principal	0.00	0.00	0.00
Other Additional Principal	0.00	0.00	0.00
Delinquent Principal	-337,906.70	-202,257.44	-540,164.14
Realized Losses	-0.00	-0.00	-0.00
Advanced Principal	337,906.70	202,257.44	540,164.14
TOTAL PRINCIPAL COLLECTED	7,828,566.48	2,218,499.11	10,047,065.59




PRINCIPAL - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK




PRINCIPAL - OTHER ACCOUNTS

	Group 2	Group 1	Total
TOTAL PRINCIPAL OTHER ACCOUNTS	0.00	0.00	0.00






Page 5 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution


INTEREST - COLLECTIONS

	Group 2	Group 1	Total
Scheduled Interest	6,342,360.35	3,053,812.72	9,396,173.07
Repurchased/Substitution Interest	1,704.29	0.00	1,704.29
Liquidation Interest	0.00	0.00	0.00
Insurance Interest	0.00	0.00	0.00
Other Additional Interest	0.00	0.00	0.00
Prepayment Interest Shortfalls	-13,139.63	-2,779.10	-15,918.73
Delinquent Interest	-5,678,455.24	-2,693,291.96	-8,371,747.20
Interest Realized Losses	-0.00	-0.00	-0.00
Compensating Interest	13,139.62	2,779.10	15,918.73
Civil Relief Act Shortfalls	-0.00	-0.00	-0.00
Interest Advanced	5,334,247.14	2,525,851.18	7,860,098.32
TOTAL INTEREST COLLECTED	5,999,856.53	2,886,371.94	8,886,228.47




INTEREST - WITHDRAWALS

	Group 2	Group 1	Total
Non Recoverable Advances	0.00	0.00	0.00
Extraordinary Trust Fund Expenses	0.00	0.00	0.00
TOTAL INTEREST WITHDRAWALS	0.00	0.00	0.00




INTEREST - OTHER ACCOUNTS
INTEREST - OTHER ACCOUNTS
	Group 2	Group 1	Total
Prepayment Charges	84,345.30	53,647.50	137,992.80

Net Swap Receipts			295,485.57
. a)Swap Payment			(4,601,658.44)
. b)Counterparty Payment			4,897,144.01

TOTAL INTEREST OTHER ACCOUNTS	84,345.30	53,647.50	433,478.37




INTEREST FEES
INTEREST FEES
	Group 2	Group 1	Total
Current Servicing Fees	42,126.15	23,273.99	65,400.14
TOTAL INTEREST FEES	42,126.15	23,273.99	65,400.14



Page 6 of 27

WaMu 2007-HE1

Mortgage Pass-Through Certificates

March 26, 2007 Distribution

Credit Enhancement Report

ACCOUNTS

Credit Support Annex Account

Beginning Balance

0.00

Interest Earnings

0.00

Amount Deposited

0.00

Amount Withdrawn

0.00

Ending Balance

0.00

Final Maturity Reserve Account

Beginning Balance

1,000.00

Interest Earnings

0.00

Amount Deposited

0.00

Amount Withdrawn

0.00

Ending Balance

1,000.00

Reserve Fund

Beginning Balance

1,002.24

Interest Earnings

2.24

Amount Deposited

0.00

Amount Withdrawn

0.00

Ending Balance

1,004.48

Supplemental Interest Account

Beginning Balance

1,002.24

Interest Earnings

2.24

Amount Deposited

0.00

Amount Withdrawn

0.00

Ending Balance

1,004.48

INSURANCE

SPACE INTENTIONALLY LEFT BLANK

Page 7 of 27

WaMu 2007-HE1

Mortgage Pass-Through Certificates

March 26, 2007 Distribution

STRUCTURAL FEATURES

Group 2

Group 1

Total

Overcollateralized Amount - Prior Period

33,451,062.04

Current Period Principal Loss

0.00

Overcollateralized Amount - After Current Losses

33,451,062.04

Overcollateralization Increase Amount

0.00

Overcollateralization Release Amount

0.00

Overcollateralization Amount - Ending

33,451,062.04

Overcollateralization Excess Amount

0.00

Overcollateralization Deficiency Amount

0.00

Overcollateralized Target Amount

33,451,062.04

Net Monthly Excess Cashflow

2,989,170.71

Page 8 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution

Collateral Report


COLLATERAL




		Group 2	Group 1	Total



Loan Count:


Original	3,779	2,542	6,321
Prior	3,749	2,530	6,279
Prefunding	0	0	0
Scheduled Paid Offs	-0	-0	-0
Full Voluntary Prepayments	-31	-9	-40
Repurchases	-1	-0	-1
Liquidations	-0	-0	-0
Current	3,717	2,521	6,238
Principal Balance:


Original	932,936,635.74	460,857,615.84	1,393,794,251.58
Prior	927,202,215.19	457,715,444.63	1,384,917,659.82
Prefunding	0.00	0.00	0.00
Scheduled Principal	-382,211.30	-231,665.96	-613,877.26
Partial Prepayments	-13,133.16	-16,767.00	-29,900.16
Full Voluntary Prepayments	-7,181,512.21	-1,970,066.15	-9,151,578.36
Repurchases	-251,709.81	-0.00	-251,709.81
Liquidations	-0.00	-0.00	-0.00
Current	919,373,648.71	455,496,945.52	1,374,870,594.23





PREFUNDING

	Group 2	Group 1	Total
Substituted Loans Bal (Included in Partial Prepayments)
Substituted Loans Added (Included in Prior Loan Count)

Page 9 of 27

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Mortgage Pass-Through Certificates
March 26, 2007 Distribution


CHARACTERISTICS
CHARACTERISTICS

	Group 2	Group 1	Total
Weighted Average Coupon Original	8.21751%	8.00915%	8.14862%
Weighted Average Coupon Prior	8.21751%	8.00915%	8.14862%
Weighted Average Coupon Current	8.21059%	8.00623%	8.14305%
Weighted Average Months to Maturity Original	362	365	363
Weighted Average Months to Maturity Prior	362	365	363
Weighted Average Months to Maturity Current	362	364	362
Weighted Avg Remaining Amortization Term Original	412	411	412
Weighted Avg Remaining Amortization Term Prior	412	411	412
Weighted Avg Remaining Amortization Term Current	411	410	411
Weighted Average Seasoning Original	3.31	1.86	2.83
Weighted Average Seasoning Prior	3.31	1.86	2.83
Weighted Average Seasoning Current	4.25	2.86	3.79

Page 10 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution


ARM CHARACTERISTICS
ARM CHARACTERISTICS

	Group 2	Group 1	Total
Weighted Average Margin Original	5.07337%	5.22900%	5.12220%
Weighted Average Margin Prior	5.07337%	5.22900%	5.12220%
Weighted Average Margin Current	5.07337%	5.22893%	5.12215%
Weighted Average Max Rate Original	14.40883%	14.18802%	14.33955%
Weighted Average Max Rate Prior	14.40883%	14.18802%	14.33955%
Weighted Average Max Rate Current	14.40478%	14.18587%	14.33613%
Weighted Average Min Rate Original	8.07439%	8.18802%	8.11004%
Weighted Average Min Rate Prior	8.07439%	8.18802%	8.11004%
Weighted Average Min Rate Current	8.06835%	8.18587%	8.10520%
Weighted Average Cap Up Original	0.99966%	1.00000%	0.99977%
Weighted Average Cap Up Prior	0.99966%	1.00000%	0.99977%
Weighted Average Cap Up Current	0.99966%	1.00000%	0.99977%
Weighted Average Cap Down Original	0.99966%	1.00000%	0.99977%
Weighted Average Cap Down Prior	0.99966%	1.00000%	0.99977%
Weighted Average Cap Down Current	0.99966%	1.00000%	0.99977%




SERVICING FEES & ADVANCES
SERVICING FEES & ADVANCES

	Group 2	Group 1	Total




Current Servicing Fees	42,126.15	23,273.99	65,400.14
Delinquent Servicing Fees	344,208.11	167,440.78	511,648.89
TOTAL SERVICING FEES	386,334.26	190,714.77	577,049.03


Total Servicing Fees	386,334.26	190,714.77	577,049.03
Compensating Interest	-13,139.62	-2,779.10	-15,918.73
Delinquent Servicing Fees	-344,208.11	-167,440.78	-511,648.89
COLLECTED SERVICING FEES	28,986.53	20,494.90	49,481.43


Total Advanced Interest	5,334,247.14	2,525,851.18	7,860,098.32
Total Advanced Principal	337,906.70	202,257.44	540,164.14
Aggregate Advances with respect to this Distribution	5,672,153.84	2,728,108.62	8,400,262.46
Unrecovered Advances	0.00	0.00	0.00
Non Recoverable Advance	0.00	0.00	0.00
Servicer Escrow advances	0.00	0.00	0.00




ADDITIONAL COLLATERAL INFORMATION
ADDITIONAL COLLATERAL INFORMATION
	Group 2	Group 1	Total
Prepayment Interest Shortfall (PPIS)	13,139.63	2,779.10	15,918.73
Compensating Interest	(13,139.62)	(2,779.10)	(15,918.73)
Net Prepayment Interest Shortfall (PPIS)	0.00	0.00	0.00


Weighted Average Net Mortgage Rate	7.819751%	7.646879%	7.762617%
Ending Pool Stated Principal Balance	919,373,648.71	455,496,945.52	1,374,870,594.23





Page 11 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution

Delinquency Report


TOTAL	< 1 PMT	1 PMT	2 PMTS	3 PMTS	4+ PMTS	TOTAL
	< 1 PMT	1 PMT	2 PMTS	3 PMTS	4+ PMTS	TOTAL
DELINQUENT Balance % Balance # Loans % # Loans
		23,158,271.87	0.00	0.00	0.00	23,158,271.87
		1.6844%	0.0000%	0.0000%	0.0000%	1.6844%
		97	0	0	0	97
		1.5550%	0.0000%	0.0000%	0.0000%	1.5550%
FORECLOSURE Balance % Balance # Loans % # Loans
	0.00	0.00	0.00	0.00	0.00	0.00
	0.0000%	0.0000%	0.0000%	0.0000%	0.0000%	0.0000%
	0	0	0	0	0	0
	0.0000%	0.0000%	0.0000%	0.0000%	0.0000%	0.0000%
BANKRUPTCY Balance % Balance # Loans % # Loans
	0.00	242,343.40	0.00	0.00	0.00	242,343.40
	0.0000%	0.0176%	0.0000%	0.0000%	0.0000%	0.0176%
	0	1	0	0	0	1
	0.0000%	0.0160%	0.0000%	0.0000%	0.0000%	0.0160%
REO Balance % Balance # Loans % # Loans
	0.00	0.00	0.00	0.00	0.00	0.00
	0.0000%	0.0000%	0.0000%	0.0000%	0.0000%	0.0000%
	0	0	0	0	0	0
	0.0000%	0.0000%	0.0000%	0.0000%	0.0000%	0.0000%
TOTAL Balance % Balance # Loans % # Loans
	0.00	23,400,615.27	0.00	0.00	0.00	23,400,615.27
	0.0000%	1.7020%	0.0000%	0.0000%	0.0000%	1.7020%
	0	98	0	0	0	98
	0.0000%	1.5710%	0.0000%	0.0000%	0.0000%	1.5710%

Page 12 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution



GROUP 1	< 1 PMT	1 PMT	2 PMTS	3 PMTS	4+ PMTS	TOTAL
	< 1 PMT	1 PMT	2 PMTS	3 PMTS	4+ PMTS	TOTAL
DELINQUENT Balance % Balance # Loans % # Loans
		2,283,640.11	0.00	0.00	0.00	2,283,640.11
		0.50%	0.00%	0.00%	0.00%	0.50%
		14	0	0	0	14
		0.56%	0.00%	0.00%	0.00%	0.56%
FORECLOSURE Balance % Balance # Loans % # Loans
	0.00	0.00	0.00	0.00	0.00	0.00
	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
	0	0	0	0	0	0
	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
BANKRUPTCY Balance % Balance # Loans % # Loans
	0.00	0.00	0.00	0.00	0.00	0.00
	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
	0	0	0	0	0	0
	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
REO Balance % Balance # Loans % # Loans
	0.00	0.00	0.00	0.00	0.00	0.00
	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
	0	0	0	0	0	0
	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL Balance % Balance # Loans % # Loans
	0.00	2,283,640.11	0.00	0.00	0.00	2,283,640.11
	0.00%	0.50%	0.00%	0.00%	0.00%	0.50%
	0	14	0	0	0	14
	0.00%	0.56%	0.00%	0.00%	0.00%	0.56%

Page 13 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution



GROUP 2	< 1 PMT	1 PMT	2 PMTS	3 PMTS	4+ PMTS	TOTAL
	< 1 PMT	1 PMT	2 PMTS	3 PMTS	4+ PMTS	TOTAL
DELINQUENT Balance % Balance # Loans % # Loans
		20,874,631.76	0.00	0.00	0.00	20,874,631.76
		2.27%	0.00%	0.00%	0.00%	2.27%
		83	0	0	0	83
		2.23%	0.00%	0.00%	0.00%	2.23%
FORECLOSURE Balance % Balance # Loans % # Loans
	0.00	0.00	0.00	0.00	0.00	0.00
	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
	0	0	0	0	0	0
	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
BANKRUPTCY Balance % Balance # Loans % # Loans
	0.00	242,343.40	0.00	0.00	0.00	242,343.40
	0.00%	0.03%	0.00%	0.00%	0.00%	0.03%
	0	1	0	0	0	1
	0.00%	0.03%	0.00%	0.00%	0.00%	0.03%
REO Balance % Balance # Loans % # Loans
	0.00	0.00	0.00	0.00	0.00	0.00
	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
	0	0	0	0	0	0
	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL Balance % Balance # Loans % # Loans
	0.00	21,116,975.16	0.00	0.00	0.00	21,116,975.16
	0.00%	2.30%	0.00%	0.00%	0.00%	2.30%
	0	84	0	0	0	84
	0.00%	2.26%	0.00%	0.00%	0.00%	2.26%

Page 14 of 27

WaMu 2007-HE1

Mortgage Pass-Through Certificates

March 26, 2007 Distribution

REO Report

Loan Number

Original

Stated

Current

State &

First

Principal

Paid to

Note

LTV at

Original

Payment

Loan Group

Balance

Date

Rate

Origination

Term

Date

Page 15 of 27

WaMu 2007-HE1

Mortgage Pass-Through Certificates

March 26, 2007 Distribution

Foreclosure Report

Loan Number

Original

Stated

Current

State &

First

Principal

Paid to

Note

LTV at

Original

Payment

Loan Group

Balance

Date

Rate

Origination

Term

Date

Page 16 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution

Prepayment Report

VOLUNTARY PREPAYMENTS



		Group 2	Group 1	Total


Current


Number of Paid in Full Loans	31	9	40
Number of Repurchased Loans	1	0	1
Total Number of Loans Prepaid in Full	32	9	41
Curtailments Amount	13,133.16	16,767.00	29,900.16
Paid in Full Balance	7,181,512.21	1,970,066.15	9,151,578.36
Repurchased Loans Balance	251,709.81	0.00	251,709.81
Total Prepayment Amount	7,446,355.18	1,986,833.15	9,433,188.33
Cumulative


Number of Paid in Full Loans	61	21	82
Number of Repurchased Loans	1	0	1
Total Number of Loans Prepaid in Full	62	21	83
Paid in Full Balance	12,475,354.68	4,869,089.84	17,344,444.52
Repurchased Loans Balance	251,709.81	0.00	251,709.81
Curtailments Amount	71,442.16	28,857.22	100,299.38
Total Prepayment Amount	12,798,506.65	4,897,947.06	17,696,453.71

Page 17 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution


VOLUNTARY PREPAYMENTS RATES



		Group 2	Group 1	Total





SMM	0.80%	0.43%	0.68%
3 Months Avg SMM	0.69%	0.53%	0.64%
12 Months Avg SMM	0.69%	0.53%	0.64%
Avg SMM Since Cut-off	0.69%	0.53%	0.64%



CPR	9.23%	5.09%	7.88%
3 Months Avg CPR	7.96%	6.21%	7.39%
12 Months Avg CPR	7.96%	6.21%	7.39%
Avg CPR Since Cut-off	7.96%	6.21%	7.39%



PSA	1,085.30%	889.76%	1,039.33%
3 Months Avg PSA Approximation	1,052.19%	1,315.34%	1,114.82%
12 Months Avg PSA Approximation	1,052.19%	1,315.34%	1,114.82%
Avg PSA Since Cut-off Approximation	1,052.19%	1,315.34%	1,114.82%

Page 18 of 27

WaMu 2007-HE1

Mortgage Pass-Through Certificates

March 26, 2007 Distribution

PREPAYMENT CALCULATION METHODOLOGY

Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases + Liquidation Balance)/(Beg Principal Balance - Sched Principal)

Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)

PSA Standard Prepayment Model: CPR/(0.002*min(30,WAS))

Average SMM over period between nth month and mth month (AvgSMMn,m): 1 - [(1-SMMn)*(1-SMMn+1)*...*(1-SMMm)]^(1/months in period n,m)

Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^12)

Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.002*Avg WASn,m))

Average WASn,m: (min(30,WASn)+min(30,WASn+1)+...+min(30,WASm)/(number of months in the period n,m)

Weighted Average Seasoning (WAS)

Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments and repurchases.

Dates correspond to distribution dates.

Page 19 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution

Prepayment Detail Report

Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution


Loan Number		Original			Current	State &	Type Prepayment	First


&	Loan	Principal	Prepayment	Prepayment	Note	LTV at	&	Payment

Loan Group	Status	Balance	Amount	Date	Rate	Origination	Original Term	Date

4335238 2		42,075.00	40,841.89	07-Mar-2007	12.150%	LA - 77.77%	Paid Off - 360	01-Jun-2002
4335238 2		42,075.00	40,841.89	07-Mar-2007	12.150%	LA - 77.77%	Paid Off - 360	01-Jun-2002
4360236 2		41,400.00	39,550.48	01-Mar-2007	8.350%	NE - 73.93%	Paid Off - 360	01-Jul-2002
4378121 2		45,050.00	42,510.62	21-Feb-2007	12.150%	TX - 85.00%	Paid Off - 360	01-Jul-2002
4391231 2		96,000.00	93,436.71	23-Feb-2007	11.375%	TX - 80.00%	Paid Off - 360	01-Jul-2002
4394052 2		188,119.00	180,386.50	22-Feb-2007	11.250%	CO - 80.00%	Paid Off - 360	01-Jun-2002
4394060 2		47,029.00	43,045.99	22-Feb-2007	11.250%	CO - 20.00%	Paid Off - 240	01-Jun-2002
4401519 2		165,000.00	158,535.51	20-Feb-2007	11.375%	IL - 75.00%	Paid Off - 360	01-Jul-2002
4428496 2		337,500.00	323,305.77	14-Mar-2007	10.375%	CO - 90.00%	Paid Off - 360	01-Jul-2002
4439246 2		162,900.00	154,791.03	28-Feb-2007	9.625%	CO - 90.00%	Paid Off - 360	01-Jul-2002
4451522 2		150,000.00	144,741.18	15-Feb-2007	11.375%	CA - 63.83%	Paid Off - 360	01-Jul-2002
6759568 1		265,000.00	264,432.82	16-Feb-2007	7.325%	CA - 69.74%	Paid Off - 360	01-Sep-2006
6777173 2		535,000.00	534,721.87	08-Mar-2007	9.725%	CA - 86.99%	Paid Off - 360	01-Dec-2006
6778624 1		197,250.00	196,881.50	26-Feb-2007	8.400%	MD - 81.51%	Paid Off - 360	01-Dec-2006
729311944 1		154,700.00	153,485.65	06-Mar-2007	6.800%	AZ - 67.85%	Paid Off - 360	01-Jun-2006
729673228 2		292,500.00	292,253.63	08-Mar-2007	10.250%	IL - 90.00%	Paid Off - 360	01-Jan-2007
729680983 2		217,800.00	217,409.67	12-Mar-2007	10.000%	FL - 90.00%	Paid Off - 360	01-Dec-2006
729691204 2		63,000.00	62,968.29	27-Feb-2007	12.600%	TN - 90.00%	Paid Off - 360	01-Jan-2007
729697086 2		58,500.00	58,466.35	28-Feb-2007	12.000%	TN - 90.00%	Paid Off - 360	01-Jan-2007
729707331 2		23,400.00	23,379.85	14-Mar-2007	10.150%	OH - 90.00%	Paid Off - 360	01-Jan-2007
729710384 1		279,000.00	278,635.60	06-Mar-2007	8.150%	CO - 65.65%	Paid Off - 360	01-Jan-2007
729710988 2		564,000.00	563,816.77	16-Feb-2007	9.925%	WA - 72.96%	Paid Off - 360	01-Jan-2007
729719369 2		40,500.00	40,478.43	26-Feb-2007	12.350%	MA - 90.00%	Paid Off - 360	01-Jan-2007
729724856 1		64,800.00	64,758.82	23-Feb-2007	11.550%	TX - 90.00%	Paid Off - 360	01-Jan-2007
729730457 2		656,500.00	656,136.03	15-Feb-2007	8.125%	NV - 65.00%	Paid Off - 360	01-Jan-2007
729757658 2		382,500.00	382,181.25	16-Feb-2007	10.300%	CA - 90.00%	Paid Off - 360	01-Jan-2007
729760058 2		900,000.00	899,471.34	27-Feb-2007	7.925%	CO - 72.00%	Paid Off - 360	01-Jan-2007
729766667 2		148,800.00	148,622.75	05-Mar-2007	8.600%	FL - 80.00%	Paid Off - 360	01-Jan-2007
729766899 2		148,800.00	148,622.75	05-Mar-2007	8.600%	FL - 80.00%	Paid Off - 360	01-Jan-2007
729778290 1		331,500.00	331,199.14	20-Feb-2007	9.900%	TX - 85.00%	Paid Off - 360	01-Jan-2007
729782508 2		124,200.00	124,152.73	16-Feb-2007	10.700%	OH - 90.00%	Paid Off - 360	01-Feb-2007
729789511 2		640,000.00	639,056.56	21-Feb-2007	7.550%	VA - 74.42%	Paid Off - 360	01-Jan-2007
729789768 2		134,160.00	134,086.19	21-Feb-2007	12.200%	VA - 15.60%	Paid Off - 360	01-Jan-2007
729801894 2		464,000.00	463,910.09	20-Feb-2007	11.600%	CA - 80.00%	Paid Off - 360	01-Jan-2007
729808238 2		55,800.00	55,751.46	05-Mar-2007	10.100%	MN - 90.00%	Paid Off - 360	01-Jan-2007
729809228 2		138,550.00	138,502.70	13-Mar-2007	11.200%	MI - 85.00%	Paid Off - 360	01-Feb-2007
729809806 1		308,800.00	308,615.98	26-Feb-2007	7.875%	CA - 80.00%	Paid Off - 360	01-Jan-2007
729820746 1		185,000.00	184,911.84	07-Mar-2007	9.650%	AZ - 77.41%	Paid Off - 360	01-Feb-2007
729826321 1		187,200.00	187,144.80	21-Feb-2007	7.900%	OR - 80.00%	Paid Off - 360	01-Feb-2007
729835553 2		96,500.00	96,474.74	28-Feb-2007	12.400%	CA - 11.70%	Paid Off - 360	01-Feb-2007
729848812 2		280,000.00	279,903.08	02-Mar-2007	7.750%	CA - 80.00%	Paid Off - 480	01-Feb-2007


Page 20 of 27

WaMu 2007-HE1

Mortgage Pass-Through Certificates

March 26, 2007 Distribution

Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution

Loan Number

Original

Current

State &

Type Prepayment

First

Loan

Principal

Prepayment

Note

LTV at

Payment

Loan Group

Status

Balance

Amount

Date

Rate

Origination

Original Term

Date

6777460 2

251,920.00

251,709.81

07-Feb-2007

8.125%

CA - 80.00%

Repur/Subs - 360

01-Dec-2006

TOTAL

9,464,753.00

9,403,288.17

Page 21 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution

Realized Loss Report

COLLATERAL REALIZED LOSSES



	Group 2	Group 1	Total


Current





Subsequent Recoveries	0.00	0.00	0.00
Number of Loans Liquidated	0	0	0
Collateral Principal Realized Loss/(Gain) Amount	0.00	0.00	0.00
Collateral Interest Realized Loss/(Gain) Amount	0.00	0.00	0.00
Net Liquidation Proceeds	0.00	0.00	0.00
Cumulative
Cumulative



Number of Loans Liquidated	0	0	0
Collateral Realized Loss/(Gain) Amount	0.00	0.00	0.00
Net Liquidation Proceeds	0.00	0.00	0.00
Cumulative Subsequent Recoveries	0.00	0.00	0.00

Page 22 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution


DEFAULT SPEEDS

	Group 2	Group 1	Total




MDR	0.00%	0.00%	0.00%
3 Months Avg MDR	0.00%	0.00%	0.00%
12 Months Avg MDR	0.00%	0.00%	0.00%
Avg MDR Since Cut-off	0.00%	0.00%	0.00%


CDR	0.00%	0.00%	0.00%
3 Months Avg CDR	0.00%	0.00%	0.00%
12 Months Avg CDR	0.00%	0.00%	0.00%
Avg CDR Since Cut-off	0.00%	0.00%	0.00%


SDA	0.00%	0.00%	0.00%
3 Months Avg SDA Approximation	0.00%	0.00%	0.00%
12 Months Avg SDA Approximation	0.00%	0.00%	0.00%
Avg SDA Since Cut-off Approximation	0.00%	0.00%	0.00%


Loss Severity Approximation for Current Period	0.00%	0.00%	0.00%
3 Months Avg Loss Severity Approximation	0.00%	0.00%	0.00%
12 Months Avg Loss Severity Approximation	0.00%	0.00%	0.00%
Avg Loss Severity Approximation Since Cut-off	0.00%	0.00%	0.00%

Page 23 of 27

WaMu 2007-HE1

Mortgage Pass-Through Certificates

March 26, 2007 Distribution

COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY

Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)

Conditional Default Rate (CDR): 1-((1-MDR)^12)

SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)*0.02,MAX(0.03,MIN(30,WAS)*0.02-0.0095*(WAS-60)))

Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn)*(1-MDRn+1)*...*(1-MDRm)]^(1/months in period n,m)

Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)

Average SDA Approximation over period between the nth month and mth month:

AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)*0.02,MAX(0.03,MIN(30,Avg WASn,m)*0.02-0.0095*(Avg WASn,m-60)))

Average WASn,m: (WASn + WASn+1 +...+ WASm )/(number of months in the period n,m)

Loss Severity Approximation for current period: sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

Average Loss Severity Approximation over period between nth month and mth month: Weighted Avg(Loss Severityn,m)

Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.

Dates correspond to distribution dates.

Page 24 of 27

WaMu 2007-HE1

Mortgage Pass-Through Certificates

March 26, 2007 Distribution

Realized Loss Detail Report

Loan Number

Current

State &

Prior

Realized

Cumulative

Loan

Note

LTV at

Original

Principal

Loss/(Gain)

Realized

Loan Group

Status

Rate

Origination

Term

Balance

Revision

Loss/(Gain)

TOTAL

Page 25 of 27

WaMu 2007-HE1

Mortgage Pass-Through Certificates

March 26, 2007 Distribution

Triggers and Adj. Cert. Report

TRIGGER EVENTS

Group 2

Group 1

Total

Does a Trigger Event Exist?

Has the Stepdown Date Occurred?

Master Servicer Event of Default

60+ Day Delinquency Balance (includes all REO and FC)

0.00

Beginning Stated Principal Balance

1,384,917,659.82

Delinquency Percentage

0.000000%

Offered Subordinate and C Class Certificate Balances

280,154,062.04

Beginning Stated Principal Balance

1,384,917,659.82

Credit Enhancement Percentage

20.228900%

Cumulative Loss Percentage

0.00000000%

ADJUSTABLE RATE CERTIFICATE INFORMATION

SPACE INTENTIONALLY LEFT BLANK

ADDITIONAL INFORMATION

Group 2

Group 1

Total

Current LIBOR Rate

5.320000%

Libor Rate Determination Date

02/22/2007

Next LIBOR Rate

5.320000%

Next Libor Determination Date

03/22/2007

Page 26 of 27

WaMu 2007-HE1



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
March 26, 2007 Distribution

Additional Certificate Report

ADDITIONAL CERTIFICATE REPORT

		Next Pass Through Rate	CarryOver Amounts Unpaid	Prior Carryfrwd Due	Interest on Carryfrwd	Carryover Amounts Paid
CLASS

	I-A	5.470%	$0.00	$0.00	$0.00	$0.00
		5.470%	$0.00	$0.00	$0.00	$0.00
	II-A1	5.370%	$0.00	$0.00	$0.00	$0.00
		5.370%	$0.00	$0.00	$0.00	$0.00
	II-A2	5.430%	$0.00	$0.00	$0.00	$0.00
		5.430%	$0.00	$0.00	$0.00	$0.00
	II-A3	5.470%	$0.00	$0.00	$0.00	$0.00
		5.470%	$0.00	$0.00	$0.00	$0.00
	II-A4	5.550%	$0.00	$0.00	$0.00	$0.00
		5.550%	$0.00	$0.00	$0.00	$0.00
	M-1	5.560%	$0.00	$0.00	$0.00	$0.00
		5.560%	$0.00	$0.00	$0.00	$0.00
	M-2	5.600%	$0.00	$0.00	$0.00	$0.00
		5.600%	$0.00	$0.00	$0.00	$0.00
	M-3	5.640%	$0.00	$0.00	$0.00	$0.00
		5.640%	$0.00	$0.00	$0.00	$0.00
	M-4	5.690%	$0.00	$0.00	$0.00	$0.00
		5.690%	$0.00	$0.00	$0.00	$0.00
	M-5	5.720%	$0.00	$0.00	$0.00	$0.00
		5.720%	$0.00	$0.00	$0.00	$0.00
	M-6	5.780%	$0.00	$0.00	$0.00	$0.00
		5.780%	$0.00	$0.00	$0.00	$0.00
	M-7	6.220%	$0.00	$0.00	$0.00	$0.00
		6.220%	$0.00	$0.00	$0.00	$0.00
	M-8	6.920%	$0.00	$0.00	$0.00	$0.00
		6.920%	$0.00	$0.00	$0.00	$0.00
	M-9	7.570%	$0.00	$0.00	$0.00	$0.00
		7.570%	$0.00	$0.00	$0.00	$0.00
	B-1	7.570%	$0.00	$0.00	$0.00	$0.00
		7.570%	$0.00	$0.00	$0.00	$0.00
	B-2	7.570%	$0.00	$0.00	$0.00	$0.00
		7.570%	$0.00	$0.00	$0.00	$0.00
	C	0.000%	$0.00	$0.00	$0.00	$0.00
		0.000%	$0.00	$0.00	$0.00	$0.00
	P	0.000%	$0.00	$0.00	$0.00	$0.00
		0.000%	$0.00	$0.00	$0.00	$0.00
	R	0.000%	$0.00	$0.00	$0.00	$0.00
		0.000%	$0.00	$0.00	$0.00	$0.00
	R-CX	0.000%	$0.00	$0.00	$0.00	$0.00
		0.000%	$0.00	$0.00	$0.00	$0.00
	R-PX	0.000%	$0.00	$0.00	$0.00	$0.00
		0.000%	$0.00	$0.00	$0.00	$0.00






Page 27 of 27

WaMu Asset-Backed Certificates, WaMu Series 2007-HE1 10-D/A