CVE-2011-3304: Cisco 5500 Series Adaptive Security Appliance

High severity, CVSS 7.8. EPSS: 2.6% chance of exploitation in the next 30 days.

Cisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services module in Cisco Catalyst 6500 series devices, with software 7.2 before 7.2(5.3), 8.0 before 8.0(5.25), 8.1 before 8.1(2.50), 8.2 before 8.2(5.11), 8.3 before 8.3(2.23), 8.4 before 8.4(2), and 8.5 before 8.5(1.1) allow remote attackers to cause a denial of service (device reload) via crafted MSN Instant Messenger traffic, aka Bug ID CSCtl67486.

Affected products

• Cisco 5500 Series Adaptive Security Appliance
• Cisco Adaptive Security Appliance Software: version 7.0 only; version 7.0(0) only; version 7.0(1) only; version 7.0(2) only; version 7.0(4) only; version 7.0(5) only; …
• Cisco ASA 5500
• Cisco Catalyst 6500
• Cisco Catalyst 7600

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