CVE-2008-1743: Cisco Unified Communications Manager

High severity, CVSS 7.8. EPSS: 1.5% chance of exploitation in the next 30 days.

Memory leak in the Certificate Trust List (CTL) Provider service in Cisco Unified Communications Manager (CUCM) 5.x before 5.1(3) and 6.x before 6.1(1) allows remote attackers to cause a denial of service (memory consumption and service interruption) via a series of malformed TCP packets, aka Bug ID CSCsi98433.

Affected products

• Cisco Unified Communications Manager: from 5.0, before 5.1\(3\) (fixed in 5.1\(3\)); from 6.0, before 6.1\(1\) (fixed in 6.1\(1\))

Published 2008-05-16. Last modified 2026-06-16.