CVE-2007-1834: Cisco Unified Callmanager

High severity, CVSS 7.8. EPSS: 1.9% chance of exploitation in the next 30 days.

Cisco Unified CallManager (CUCM) 5.0 before 5.0(4a)SU1 and Cisco Unified Presence Server (CUPS) 1.0 before 1.0(3) allow remote attackers to cause a denial of service (loss of voice services) via a flood of ICMP echo requests, aka bug ID CSCsf12698.

Affected products

• Cisco Unified Callmanager: version 5.0 only; version 5.0(1) only; version 5.0(2) only; version 5.0(3) only; version 5.0(3a) only; version 5.0(4) only
• Cisco Unified Presence Server: version 1.0 only; version 1.0(1) only; version 1.0(2) only

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