CVE-2011-2560: Cisco Unified Communications Manager

High severity, CVSS 7.8. EPSS: 1.8% chance of exploitation in the next 30 days.

The Packet Capture Service in Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x does not properly handle idle TCP connections, which allows remote attackers to cause a denial of service (memory consumption and restart) by making many connections, aka Bug ID CSCtf97162.

Affected products

• Cisco Unified Communications Manager: version 4.1(3) only; version 4.1(3)sr1 only; version 4.1(3)sr2 only; version 4.1(3)sr3 only; version 4.1(3)sr4 only; version 4.2 only; …

Published 2011-08-29. Last modified 2026-06-16.