CVE-2009-2866: Cisco IOS

High severity, CVSS 7.8. EPSS: 2.9% chance of exploitation in the next 30 days.

Unspecified vulnerability in Cisco IOS 12.2 through 12.4 allows remote attackers to cause a denial of service (device reload) via a crafted H.323 packet, aka Bug ID CSCsz38104.

Affected products

• Cisco IOS: version 12.2b only; version 12.2bx only; version 12.2cz only; version 12.2mc only; version 12.2t only; version 12.2yh only; …

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