CVE-2001-0866: Cisco 12000 Router

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

Cisco 12000 with IOS 12.0 and lines card based on Engine 2 does not properly handle an outbound ACL when an input ACL is not configured on all the interfaces of a multi port line card, which could allow remote attackers to bypass the intended access controls.

Affected products

• Cisco 12000 Router: any version

Published 2001-12-06. Last modified 2026-06-16.