CVE-2012-4618: Cisco IOS

High severity, CVSS 7.8. EPSS: 2.7% chance of exploitation in the next 30 days.

The SIP ALG feature in the NAT implementation in Cisco IOS 12.2, 12.4, and 15.0 through 15.2 allows remote attackers to cause a denial of service (device reload) via transit IP packets, aka Bug ID CSCtn76183.

Affected products

• Cisco IOS: version 12.2 only; version 12.4 only; version 15.0 only; version 15.0(1)se only; version 15.1 only; version 15.2 only

Published 2012-09-27. Last modified 2026-06-16.