CVE-2011-3301: Cisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services module in Cisco Catalyst...

Security readout for executives and security teams

This vulnerability can let a remote attacker crash and reload affected Cisco firewall platforms using crafted SunRPC traffic. For executives, the main risk is firewall availability: an exposed vulnerable device could interrupt network access during a reload. The sources do not show confirmed active exploitation. Exposure is most likely in organizations still running legacy Cisco ASA or FWSM releases from the affected version branches. Internet-facing or untrusted-network-facing firewall paths that process SunRPC traffic deserve priority review. Prioritize remediation where vulnerable legacy Cisco firewalls protect important business networks or face untrusted traffic. Treat this as an availability risk, especially for sites without redundant firewall capacity. Mitigation focus: Inventory Cisco ASA 5500, Catalyst 6500 ASA Services Module, and FWSM deployments.; Upgrade ASA software to the Cisco fixed releases or later for each affected branch.; Upgrade FWSM software to the Cisco fixed releases or later for each affected branch..

Prepared

Jun 27, 2026, 17:48 UTC (UTC+00:00)

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