CVE-2007-0481: Cisco IOS Transmission Control Protocol

High severity, CVSS 7.8. EPSS: 4.9% chance of exploitation in the next 30 days.

Cisco IOS allows remote attackers to cause a denial of service (crash) via a crafted IPv6 Type 0 Routing header.

Affected products

• Cisco IOS Transmission Control Protocol: version 12 only; version 12.0da only; version 12.0db only; version 12.0dc only; version 12.0s only; version 12.0sc only; …

Published 2007-01-25. Last modified 2026-06-16.