CVE-2014-3353: Cisco IOS XR

High severity, CVSS 7.1. EPSS: 2.5% chance of exploitation in the next 30 days.

Cisco IOS XR 4.3(.2) and earlier, as used in Cisco Carrier Routing System (CRS), allows remote attackers to cause a denial of service (CPU consumption and IPv6 packet drops) via a malformed IPv6 packet, aka Bug ID CSCuo95165.

Affected products

• Cisco IOS XR: up to and including 4.3.2; version 4.3.0 only; version 4.3.1 only

Published 2014-09-04. Last modified 2026-06-17.