CVE-2015-0642: Cisco IOS

High severity, CVSS 7.8. EPSS: 2.8% chance of exploitation in the next 30 days.

Cisco IOS 12.2, 12.4, 15.0, 15.1, 15.2, 15.3, and 15.4 and IOS XE 2.5.x, 2.6.x, 3.1.xS through 3.12.xS before 3.12.3S, 3.2.xE through 3.7.xE before 3.7.1E, 3.3.xSG, 3.4.xSG, and 3.13.xS before 3.13.2S allow remote attackers to cause a denial of service (device reload) by sending malformed IKEv2 packets over (1) IPv4 or (2) IPv6, aka Bug ID CSCum36951.

Affected products

• Cisco IOS: version 12.2 only; version 12.4 only; version 15.0 only; version 15.1 only; version 15.2 only; version 15.3 only; …
• Cisco IOS XE: version 2.5.0 only; version 2.5.1 only; version 3.1s.0 only; version 3.1s.1 only; version 3.1s.2 only; version 3.1s.3 only; …

Published 2015-03-26. Last modified 2026-06-17.