CVE-2011-3298: Cisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services module in Cisco Catalyst...

Security readout for executives and security teams

This flaw affects older Cisco firewall platforms and can let a remote attacker bypass authentication when TACACS+ replies are crafted. For organizations still running these legacy devices or modules, the business risk is unauthorized access to security infrastructure that protects network boundaries. Exposure is most likely in legacy Cisco ASA 5500, Catalyst 6500 ASA Services Module, or FWSM deployments using affected software and TACACS+ authentication. Prioritize remediation where affected devices protect production networks or expose management access. Legacy firewalls are often overlooked, but authentication bypass against them can undermine segmentation and perimeter controls. Mitigation focus: Check Cisco ASA and FWSM advisories for the applicable fixed release.; Upgrade affected ASA software to the fixed version for its release train or later.; Upgrade affected FWSM software to the fixed version for its release train or later..

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.