CVE-2009-2868: Cisco IOS

High severity, CVSS 7.8. EPSS: 1.7% chance of exploitation in the next 30 days.

Unspecified vulnerability in Cisco IOS 12.2 through 12.4, when certificate-based authentication is enabled for IKE, allows remote attackers to cause a denial of service (Phase 1 SA exhaustion) via crafted requests, aka Bug IDs CSCsy07555 and CSCee72997.

Affected products

• Cisco IOS: version 12.2ex only; version 12.2ira only; version 12.2irb only; version 12.2irc only; version 12.2sb only; version 12.2sca only; …

Published 2009-09-28. Last modified 2026-06-16.