CVE-2013-6981: Cisco IOS XE

Medium severity, CVSS 5.4. EPSS: 3% chance of exploitation in the next 30 days.

Cisco IOS XE 3.7S(.1) and earlier allows remote attackers to cause a denial of service (Packet Processor crash) via fragmented MPLS IP packets, aka Bug ID CSCul00709.

Affected products

• Cisco IOS XE: up to and including 3.7s\(.1\); version 2.5(.0) only; version 2.6(.0) only; version 2.6(.1) only; version 2.6(.2) only; version 3.1s(.0) only; …

Published 2013-12-28. Last modified 2026-06-17.