CVE-2014-2124: Cisco IOS 15.1(2)SY3 and earlier, when used with Supervisor Engine 2T (aka Sup2T) on Catalyst 6500 devices,...

Security readout for executives and security teams

This flaw can let a remote attacker crash certain Cisco Catalyst 6500 switches by sending crafted multicast packets. The impact is availability, not known data theft. The provided sources identify a narrow platform scope: Cisco IOS 15.1(2)SY3 and earlier with Supervisor Engine 2T on Catalyst 6500 devices. Exposure is most likely in legacy networks still operating Catalyst 6500 devices with Sup2T and affected Cisco IOS releases. Risk increases where multicast traffic from untrusted or broad network segments can reach the device. Prioritize if Catalyst 6500 Sup2T switches support critical network paths. The business risk is outage from device crashes, especially in legacy core or distribution environments. If the platform is absent, urgency is low. Mitigation focus: Check Cisco advisory guidance for fixed software, workarounds, and affected-release confirmation.; Inventory Catalyst 6500 Sup2T systems and prioritize affected IOS versions for remediation planning.; Limit untrusted multicast reachability to affected infrastructure where operationally feasible..

Prepared

Jun 14, 2026, 14:32 UTC (UTC+00:00)

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