CVE-2011-3296: Cisco Catalyst 6500

High severity, CVSS 7.8. EPSS: 1.8% chance of exploitation in the next 30 days.

Cisco Firewall Services Module (aka FWSM) 3.1 before 3.1(21), 3.2 before 3.2(22), 4.0 before 4.0(16), and 4.1 before 4.1(7), when IPv6 is used, allows remote attackers to cause a denial of service (memory corruption and module crash or hang) via vectors that trigger syslog message 302015, aka Bug ID CSCti83875.

Affected products

• Cisco Catalyst 6500
• Cisco Catalyst 7600
• Cisco Firewall Services Module Software: version 3.1 only; version 3.1(2) only; version 3.1(3) only; version 3.1(4) only; version 3.1(5) only; version 3.1(6) only; …

Published 2011-10-06. Last modified 2026-06-16.