CVE-2011-0935: Cisco IOS

High severity, CVSS 10.0. EPSS: 4% chance of exploitation in the next 30 days.

The PKI functionality in Cisco IOS 15.0 and 15.1 does not prevent permanent caching of certain public keys, which allows remote attackers to bypass authentication and have unspecified other impact by leveraging an IKE peer relationship in which a key was previously valid but later revoked, aka Bug ID CSCth82164, a different vulnerability than CVE-2010-4685.

Affected products

• Cisco IOS: version 15.0 only; version 15.1 only

Published 2011-04-14. Last modified 2026-06-16.