Guaranteed Distributions and "Term of this Policy" shall have the meanings set forth in Endorsement No. 1 hereto. This Policy sets forth in full the undertaking of Financial Security, and shall not be modified, altered or affected by any other agreement or instrument, including any modification or amendment thereto. Except to the extent expressly modified by an endorsement hereto, the premiums paid in respect of this Policy are nonrefundable for any reason whatsoever. This Policy may not be canceled or revoked during the Term of this Policy. An acceleration payment shall not be due under this Policy unless such acceleration is at the sole option of Financial Security. THIS POLICY IS NOT COVERED BY THE PROPERTY/CASUALTY INSURANCE SECURITY FUND SPECIFIED IN ARTICLE 76 OF THE NEW YORK INSURANCE LAW. In witness whereof, FINANCIAL SECURITY ASSURANCE INC. has caused this Policy to be executed on its behalf by its Authorized Officer. FINANCIAL SECURITY ASSURANCE INC. By__________________________________ AUTHORIZED OFFICER A subsidiary of Financial Security Assurance Holdings Ltd. 350 Park Avenu▇, ▇▇▇ ▇▇▇▇, ▇.▇. ▇▇▇▇▇-▇▇▇▇ (212) 826-0100 ▇▇▇▇ ▇▇▇▇▇ (▇/89) ENDORSEMENT NO. 1 TO FINANCIAL GUARANTY INSURANCE POLICY FINANCIAL SECURITY 350 Park Avenu▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇. New York, New ▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇: The Trust created by the Pooling and Servicing Agreement, dated as of September 1, 2002 among Credit Suisse First Boston Mortgage Securities Corp. as Depositor, DLJ Mortgage Capital, Inc., as Seller, Wilshire Credit Corporation, as Servicer, Washington Mutual Bank, FA as a servicer, Ocwen Federal Bank FSB, as Servicer, and JPMorgan Chase Bank, as Trustee CERTIFICATES: $90,250,000 Home Equity Mortgage Trust 2002-3 Home Equity Mortgage Pass- Through Certificates, Series 2002-3, Class A-1 Certificates and Class A-3 Certificates Policy No.: [51323-N] Date of Issuance: September 26, 2002