CVE-2013-1142: Cisco IOS

High severity, CVSS 7.8. EPSS: 1.1% chance of exploitation in the next 30 days.

Race condition in the VRF-aware NAT feature in Cisco IOS 12.2 through 12.4 and 15.0 through 15.2 allows remote attackers to cause a denial of service (memory consumption) via IPv4 packets, aka Bug IDs CSCtg47129 and CSCtz96745.

Affected products

• Cisco IOS: from 12.2, up to and including 12.4; from 15.0, up to and including 15.2

Published 2013-03-28. Last modified 2026-06-16.