CVE-2012-3923: Cisco IOS

Low severity, CVSS 3.5. EPSS: 0.9% chance of exploitation in the next 30 days.

The SSLVPN implementation in Cisco IOS 12.4, 15.0, 15.1, and 15.2, when DTLS is not enabled, does not properly handle certain outbound ACL configurations, which allows remote authenticated users to cause a denial of service (device crash) via a session involving a PPP over ATM (PPPoA) interface, aka Bug ID CSCte41827.

Affected products

• Cisco IOS: version 12.4 only; version 15.0 only; version 15.1 only; version 15.2 only

Published 2012-09-16. Last modified 2026-06-16.