CVE-2011-0393: 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 with software 7.0 before 7.0(8.12), 7.1 and 7.2 before 7.2(5.2), 8.0 before 8.0(5.21), 8.1 before 8.1(2.49), 8.2 before 8.2(3.6), and 8.3 before 8.3(2.7) and Cisco PIX Security Appliances 500 series devices, when transparent firewall mode is configured but IPv6 is not configured, allow remote attackers to cause a denial of service (packet buffer exhaustion and device outage) via IPv6 traffic, aka Bug ID CSCtj04707.

Affected products

• Cisco 5500 Series Adaptive Security Appliance
• Cisco Adaptive Security Appliance Software: up to and including 8.3\(1\); version 7.0 only; version 7.0(0) only; version 7.0(2) only; version 7.0(4) only; version 7.0(5) only; …
• Cisco ASA 5500
• Cisco Pix 500: any version

Published 2011-02-25. Last modified 2026-06-16.