CVE-1999-1216: Cisco Router

High severity, CVSS 7.5. EPSS: 2.1% chance of exploitation in the next 30 days.

Cisco routers 9.17 and earlier allow remote attackers to bypass security restrictions via certain IP source routed packets that should normally be denied using the "no ip source-route" command.

Affected products

• Cisco Router: up to and including 9.17; version 8.2 only; version 8.3 only; version 9.0 only; version 9.1 only

Published 1993-04-22. Last modified 2026-06-16.