CVE-2015-0618: Cisco Carrier Routing System

High severity, CVSS 7.1. EPSS: 2.3% chance of exploitation in the next 30 days.

Cisco IOS XR 5.0.1 and 5.2.1 on Network Convergence System (NCS) 6000 devices and 5.1.3 and 5.1.4 on Carrier Routing System X (CRS-X) devices allows remote attackers to cause a denial of service (line-card reload) via malformed IPv6 packets with extension headers, aka Bug ID CSCuq95241.

Affected products

• Cisco Carrier Routing System: version 5.1.3 only; version 5.1.4 only
• Cisco IOS XR: version 5.0.1 only; version 5.2.1 only

Published 2015-02-21. Last modified 2026-06-17.