Assured Guaranty Municipal 10-K 2005 FY Annual report

Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement of Financial Security Assurance Holdings Ltd. on Form S-8 (File No. 33-78784) (1993 Equity Participation Plan) and Form S-8 (File No. 33-92648) (Deferred Compensation Plan) of:

1.Our report dated March 24, 2006, on our audits of the consolidated balance sheets of Financial Security Assurance Holdings Ltd. and Subsidiaries as of December 31, 2005 and 2004, and the related consolidated statements of operations and comprehensive income, changes in shareholders’ equity and cash flows for each of the three years in the period ended December 31, 2005 and on our audits of the financial statement schedule relating to the consolidated financial statements of Financial Security Assurance Holdings Ltd. and Subsidiaries, which report is included in this Annual Report on Form 10-K for the fiscal year ended December 31, 2005.

/s/ PricewaterhouseCoopers LLP

New York, New York

March 24, 2006