CVE-2010-0583: Cisco IOS

High severity, CVSS 7.8. EPSS: 3.1% chance of exploitation in the next 30 days.

Memory leak in the H.323 implementation in Cisco IOS 12.1 through 12.4, and 15.0M before 15.0(1)M1, allows remote attackers to cause a denial of service (memory consumption and device reload) via malformed H.323 packets, aka Bug ID CSCtb93855.

Affected products

• Cisco IOS: version 12.1xu only; version 12.1yd only; version 12.2b only

Published 2010-03-25. Last modified 2026-06-16.