CVE-2001-0650: Cisco IOS

Medium severity, CVSS 5.0. EPSS: 2.4% chance of exploitation in the next 30 days.

Cisco devices IOS 12.0 and earlier allow a remote attacker to cause a crash, or bad route updates, via malformed BGP updates with unrecognized transitive attribute.

Affected products

• Cisco IOS: up to and including 12.0; version 11.2 only; version 11.3 only; version 12.0 only

Published 2001-09-20. Last modified 2026-06-16.