CVE-2014-2143: Cisco IOS

Medium severity, CVSS 5.0. EPSS: 1.8% chance of exploitation in the next 30 days.

The IKE implementation in Cisco IOS 15.4(1)T and earlier and IOS XE allows remote attackers to cause a denial of service (security-association drop) via crafted Main Mode packets, aka Bug ID CSCun31021.

Affected products

• Cisco IOS: up to and including 15.4\(1\)t; version 15.0 only; version 15.0(1)se only; version 15.1 only; version 15.2 only; version 15.3 only; …
• Cisco IOS XE: affected versions not specified

Published 2014-04-04. Last modified 2026-06-17.