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CVE-2011-3304

• Severity: high (CVSS 7.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2011-10-06 · updated 2026-06-16
• Weakness: CWE-399

Description

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: all versions
• Cisco ASA Software: 7.0, 7.0(0), 7.0(1), 7.0(2), 7.0(4), 7.0(5) (+67)
• Cisco Asa 5500: all versions
• Cisco Catalyst 6500: all versions
• Cisco Catalyst 7600: all versions

References

• http://osvdb.org/76091
• http://www.cisco.com/warp/public/707/cisco-sa-20111005-asa.shtml
• http://www.securityfocus.com/bid/49952
• https://exchange.xforce.ibmcloud.com/vulnerabilities/70334
• http://osvdb.org/76091
• http://www.cisco.com/warp/public/707/cisco-sa-20111005-asa.shtml
• http://www.securityfocus.com/bid/49952
• https://exchange.xforce.ibmcloud.com/vulnerabilities/70334

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