CVE-2012-4620: Cisco 10008 Router

High severity, CVSS 7.8. EPSS: 2.8% chance of exploitation in the next 30 days.

Cisco IOS 12.2 and 15.0 through 15.2 on Cisco 10000 series routers, when a tunnel interface exists, allows remote attackers to cause a denial of service (interface queue wedge) via tunneled (1) GRE/IP, (2) IPIP, or (3) IPv6 in IPv4 packets, aka Bug ID CSCts66808.

Affected products

• Cisco 10008 Router: any version
• Cisco IOS: version 12.2 only; version 15.0 only; version 15.0(1)se only; version 15.1 only; version 15.2 only

Published 2012-09-27. Last modified 2026-06-16.