CVE-2012-0353: The UDP inspection engine on Cisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Serv...

Security readout for executives and security teams

This vulnerability can make affected Cisco ASA 5500 or ASASM firewall devices reload when they process a crafted sequence of UDP packets. A reload can interrupt network security enforcement and connectivity. The source bundle does not provide CVSS scoring or evidence of active exploitation. Exposure is most likely in organizations still running the listed legacy Cisco ASA or ASASM software versions, especially where devices process IPv4 or IPv6 UDP traffic through inspection. Current exposure depends on inventory, software version, and configuration, which the provided sources do not enumerate. Treat this as a targeted network availability risk for legacy Cisco firewall estates. It is not marked KEV and lacks CVSS data in the bundle, but a firewall reload can still disrupt critical access paths. Prioritize inventory confirmation and upgrade planning. Mitigation focus: Inventory Cisco ASA 5500 and Catalyst 6500 ASASM devices and software versions.; Upgrade affected software to the Cisco fixed releases or later named in the advisory.; Review Cisco advisory cisco-sa-20120314-asa before changing inspection behavior..

Prepared

Jun 24, 2026, 12:52 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.