CVE-2011-0941: Cisco IOS

High severity, CVSS 7.8. EPSS: 1.2% chance of exploitation in the next 30 days.

Memory leak in Cisco Unified Communications Manager (CUCM) 6.x before 6.1(5)su2, 7.x before 7.1(5b)su3, 8.x before 8.0(3a)su1, and 8.5 before 8.5(1), and Cisco IOS 12.4 and 15.1, allows remote attackers to cause a denial of service (memory consumption and process failure or device reload) via a malformed SIP message, aka Bug IDs CSCti75128 and CSCtj09179.

Affected products

• Cisco IOS: version 12.4 only; version 15.1 only
• Cisco Unified Communications Manager: version 6.0 only; version 6.1(1) only; version 6.1(1a) only; version 6.1(1b) only; version 6.1(2) only; version 6.1(2)su1 only; …

Published 2011-11-01. Last modified 2026-06-16.