CVE-2007-5651: Cisco Catos

High severity, CVSS 7.1. EPSS: 1.8% chance of exploitation in the next 30 days.

Unspecified vulnerability in the Extensible Authentication Protocol (EAP) implementation in Cisco IOS 12.3 and 12.4 on Cisco Access Points and 1310 Wireless Bridges (Wireless EAP devices), IOS 12.1 and 12.2 on Cisco switches (Wired EAP devices), and CatOS 6.x through 8.x on Cisco switches allows remote attackers to cause a denial of service (device reload) via a crafted EAP Response Identity packet.

Affected products

• Cisco Catos: version 6.1 only; version 6.2 only; version 6.3 only; version 6.4 only; version 7.1 only; version 7.2 only; …
• Cisco IOS: version 12.1 only; version 12.2 only; version 12.3ja only; version 12.3jea only; version 12.3jeb only; version 12.3jec only; …

Published 2007-10-23. Last modified 2026-06-16.