CVE-2012-0388: Cisco IOS

High severity, CVSS 7.8. EPSS: 1.5% chance of exploitation in the next 30 days.

Memory leak in the H.323 inspection feature in the Zone-Based Firewall in Cisco IOS 12.4, 15.0, 15.1, and 15.2 allows remote attackers to cause a denial of service (memory consumption or device reload) via malformed transit H.323 traffic, aka Bug ID CSCtq45553.

Affected products

• Cisco IOS: version 12.4 only; version 15.0 only; version 15.1 only; version 15.2 only

Published 2012-03-29. Last modified 2026-06-16.