CVE-2008-1748: Cisco Unified Communications Manager

High severity, CVSS 7.8. EPSS: 2.5% chance of exploitation in the next 30 days.

Cisco Unified Communications Manager 4.1 before 4.1(3)SR7, 4.2 before 4.2(3)SR4, 4.3 before 4.3(2), 5.x before 5.1(3), and 6.x before 6.1(1) does not properly validate SIP URLs, which allows remote attackers to cause a denial of service (service interruption) via a SIP INVITE message, aka Bug ID CSCsl22355.

Affected products

• Cisco Unified Communications Manager: from 4.1, before 4.1\(3\)sr7 (fixed in 4.1\(3\)sr7); from 4.2, before 4.2\(3\)sr4 (fixed in 4.2\(3\)sr4); from 4.3, before 4.3\(2\) (fixed in 4.3\(2\)); 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.