CVE-2007-1833: Cisco Unified Callmanager

Medium severity, CVSS 5.0. EPSS: 2.4% chance of exploitation in the next 30 days.

The Skinny Call Control Protocol (SCCP) implementation in Cisco Unified CallManager (CUCM) 3.3 before 3.3(5)SR2a, 4.1 before 4.1(3)SR4, 4.2 before 4.2(3)SR1, and 5.0 before 5.0(4a)SU1 allows remote attackers to cause a denial of service (loss of voice services) by sending crafted packets to the (1) SCCP (2000/tcp) or (2) SCCPS (2443/tcp) port.

Affected products

• Cisco Unified Callmanager: version 3.3 only; version 3.3(2) only; version 3.3(2)spb only; version 3.3(2)spc only; version 3.3(3) only; version 3.3(3)sr1 only; …

Published 2007-04-03. Last modified 2026-06-16.