CVE-2014-2124: Cisco Catalyst 6500

High severity, CVSS 7.1. EPSS: 1.9% chance of exploitation in the next 30 days.

Cisco IOS 15.1(2)SY3 and earlier, when used with Supervisor Engine 2T (aka Sup2T) on Catalyst 6500 devices, allows remote attackers to cause a denial of service (device crash) via crafted multicast packets, aka Bug ID CSCuf60783.

Affected products

• Cisco Catalyst 6500
• Cisco IOS: up to and including 15.1\(2\)sy3

Published 2014-03-21. Last modified 2026-06-17.