CVE-2012-0383: Cisco IOS

High severity, CVSS 7.8. EPSS: 2% chance of exploitation in the next 30 days.

Memory leak in the NAT feature in Cisco IOS 12.4, 15.0, and 15.1 allows remote attackers to cause a denial of service (memory consumption, and device hang or reload) via SIP packets that require translation, related to a "memory starvation vulnerability," aka Bug ID CSCti35326.

Affected products

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

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