CVE-2013-1121: Cisco NX-OS

Medium severity, CVSS 5.4. EPSS: 1.1% chance of exploitation in the next 30 days.

The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is configured for inbound routes, allows remote attackers to cause a denial of service (device reload) via a crafted AS path set, aka Bug ID CSCuf49554.

Affected products

• Cisco NX-OS: affected versions not specified

Published 2013-09-19. Last modified 2026-06-16.