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The auth-proxy functionality in Cisco Firewall Services Module (FWSM) software 3.1 and 3.2 before 3.2(20.1), 4.0 before 4.0(15.2), and 4.1 before 4.1(5.1) allows remote attackers to cause a denial of service (device reload) via a crafted URL, aka Bug ID CSCtg02624.
Use CWE-287, Cisco vendor hub and Firewall Services Module Software product page to widen CVE-2013-1155 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2011-3298, CVE-2013-1149 and CVE-2012-0356 for nearby disclosures in the same product family. Additional editorial context is available in The Weekly Cybersecurity Brief: January 30th, 2026.