CVE-2004-0054: Cisco IOS

High severity, CVSS 7.5. EPSS: 4.6% chance of exploitation in the next 30 days.

Multiple vulnerabilities in the H.323 protocol implementation for Cisco IOS 11.3T through 12.2T allow remote attackers to cause a denial of service and possibly execute arbitrary code, as demonstrated by the NISCC/OUSPG PROTOS test suite for the H.225 protocol.

Affected products

• Cisco IOS: version 11.3t only; version 12.0 only; version 12.0s only; version 12.0t only; version 12.1 only; version 12.1e only; …

Published 2004-02-17. Last modified 2026-06-16.