CVE-2012-3918: Cisco Catalyst 2900

Medium severity, CVSS 4.3. EPSS: 1.1% chance of exploitation in the next 30 days.

Cisco IOS before 15.3(1)T on Cisco 2900 devices, when a VWIC2-2MFT-T1/E1 card is configured for TDM/HDLC mode, allows remote attackers to cause a denial of service (serial-interface outage) via certain Frame Relay traffic, aka Bug ID CSCub13317.

Affected products

• Cisco Catalyst 2900
• Cisco Catalyst 2900 Vlan
• Cisco Catalyst 2900xl
• Cisco IOS: up to and including 15.3\(3\)m2; version 15.3 only; version 15.3(2)s only; version 15.3(3)m only; version 15.3(3)m1 only; version 15.3(3)s only; …

Published 2014-04-23. Last modified 2026-06-16.