CVE-2007-5538: Cisco Unified Callmanager

High severity, CVSS 10.0. EPSS: 5.5% chance of exploitation in the next 30 days.

Buffer overflow in the Centralized TFTP File Locator Service in Cisco Unified Communications Manager (CUCM, formerly CallManager) 5.1 before 5.1(3), and Unified CallManager 5.0, allows remote attackers to execute arbitrary code or cause a denial of service via unspecified vectors involving the processing of filenames, aka CSCsh47712.

Affected products

• Cisco Unified Callmanager: version 5.0 only
• Cisco Unified Communications Manager: up to and including 5.1\(2\)

Published 2007-10-18. Last modified 2026-06-16.