CVE-2015-0639: Cisco IOS XE

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

The Common Flow Table (CFT) feature in Cisco IOS XE 3.6 and 3.7 before 3.7.1S, 3.8 before 3.8.0S, 3.9 before 3.9.0S, 3.10 before 3.10.0S, 3.11 before 3.11.0S, 3.12 before 3.12.0S, 3.13 before 3.13.0S, 3.14 before 3.14.0S, and 3.15 before 3.15.0S, when MMON or NBAR is enabled, allows remote attackers to cause a denial of service (device reload) via malformed IPv6 packets with IPv4 UDP encapsulation, aka Bug ID CSCua79665.

Affected products

• Cisco IOS XE: version 3.6s only; version 3.6s.0 only; version 3.6s.1 only; version 3.6s.2 only; version 3.7s only; version 3.7s.0 only; …

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