CVE-2006-1927: Cisco IOS XR

Medium severity, CVSS 5.0. EPSS: 1.8% chance of exploitation in the next 30 days.

Cisco IOS XR, when configured for Multi Protocol Label Switching (MPLS) and running on Cisco CRS-1 or Cisco 12000 series routers, allows remote attackers to cause a denial of service (Line card crash) via certain MPLS packets, as identified by Cisco bug ID CSCsc77475.

Affected products

• Cisco IOS XR: version 3.0.1 only; version 3.1.0 only; version 3.2 only; version 3.2.1 only; version 3.2.2 only; version 3.2.3 only; …

Published 2006-04-20. Last modified 2026-06-16.