CVE-2011-2058: The cat6000-dot1x component in Cisco IOS 12.2 before 12.2(33)SXI7 does not properly handle an external loop...

Security readout for executives and security teams

This issue can let a remote attacker trigger a denial of service on affected Cisco IOS switching environments by causing a traffic storm involving 802.1X-enabled ports. The business impact is potential local network disruption, not data theft, based on the provided sources. Exposure is most likely where Cisco IOS 12.2 prior to 12.2(33)SXI7 is running with dot1x-enabled ports in the cat6000-dot1x/Catalyst 6500 context referenced by Cisco. Exact affected product inventory is not fully enumerated in the source bundle. Treat this as an operational resilience issue for legacy Cisco switching environments. Prioritize remediation if affected switches support business-critical network segments or if 802.1X-enabled ports are broadly deployed. Mitigation focus: Identify Cisco IOS 12.2 systems running versions before 12.2(33)SXI7.; Review Cisco guidance for Bug ID CSCtq36336 and applicable fixed releases.; Upgrade affected systems to 12.2(33)SXI7 or a later vendor-supported release if applicable..

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.