CVE-2013-3459: Cisco Unified Communications Manager

High severity, CVSS 7.8. EPSS: 1.3% chance of exploitation in the next 30 days.

Cisco Unified Communications Manager (Unified CM) 7.1(x) before 7.1(5b)su6a does not properly handle errors, which allows remote attackers to cause a denial of service (service disruption) via malformed registration messages, aka Bug ID CSCuf93466.

Affected products

• Cisco Unified Communications Manager: version 7.1(2a) only; version 7.1(2a)su1 only; version 7.1(2b) only; version 7.1(2b)su1 only; version 7.1(3) only; version 7.1(3a) only; …

Published 2013-08-25. Last modified 2026-06-16.