CVE-2011-2057: The cat6000-dot1x component in Cisco IOS 12.2 before 12.2(33)SXI7 does not properly handle (1) a loop betwe...

Security readout for executives and security teams

This flaw can let an attacker cause a network traffic storm in affected Cisco IOS 12.2 cat6000-dot1x handling. The business risk is availability: impacted switching environments could experience disruption rather than data theft. The provided sources do not include CVSS scoring, confirmed exploitation, or detailed workaround guidance. Exposure appears limited to environments running Cisco IOS 12.2 before 12.2(33)SXI7 with affected cat6000-dot1x configurations. Highest concern is switching infrastructure where dot1x and mixed authentication port states are present. The source bundle does not provide complete CPE or product inventory data. Treat as a network availability risk, not a confirmed breach indicator. Prioritize if legacy Cisco IOS switching remains in production, especially in critical sites. If affected infrastructure is retired or upgraded, urgency is lower but should still be documented. Mitigation focus: Upgrade affected Cisco IOS 12.2 deployments to 12.2(33)SXI7 or later guidance-supported software.; Review Cisco release notes and advisories for CSCtq36327-specific guidance.; Identify and correct risky loops involving dot1x, open-authentication dot1x, and non-dot1x ports..

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.