CVE-2005-1517: Cisco Firewall Services Module

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

Unknown vulnerability in Cisco Firewall Services Module (FWSM) 2.3.1 and earlier, when using URL, FTP, or HTTPS filtering exceptions, allows certain TCP packets to bypass access control lists (ACLs).

Affected products

• Cisco Firewall Services Module: up to and including 2.3\(1\)

Published 2005-05-11. Last modified 2026-06-16.