CVE-2015-6366: Cisco IOS

Medium severity, CVSS 5.0. EPSS: 1.6% chance of exploitation in the next 30 days.

Cisco IOS 15.2(04)M6 and 15.4(03)S lets physical-interface ACLs supersede tunnel-interface ACLs, which allows remote attackers to bypass intended network-traffic restrictions in opportunistic circumstances by using a tunnel, aka Bug ID CSCur01042.

Affected products

• Cisco IOS: version 15.2(4)m6 only; version 15.4(3)s only

Published 2015-11-13. Last modified 2026-06-17.