CVE-2011-3300: Cisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services module in Cisco Catalyst...

Security readout for executives and security teams

CVE-2011-3300 is a denial-of-service issue in older Cisco ASA, ASA Services Module, and FWSM firewall software. A remote attacker could send crafted SunRPC traffic that causes the device to reload, disrupting firewall availability and dependent network services. Exposure is most likely in organizations still running legacy Cisco ASA 7.x/8.x or FWSM 3.x/4.x software. Internet-edge and data-center firewall deployments have higher operational impact if reachable SunRPC traffic can reach affected devices. Treat this as a business-continuity risk for legacy Cisco firewalls. It is not described as data theft or remote code execution, but a firewall reload can interrupt VPN, internet, and internal segmentation services. Mitigation focus: Compare running ASA and FWSM releases with Cisco advisory fixed-version thresholds.; Upgrade affected devices to Cisco fixed software versions or later supported releases.; Check Cisco advisories for any product-specific workarounds or deployment guidance..

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.