CVE-2008-5180: Microsoft Office Communicator

Medium severity, CVSS 5.3. EPSS: 68% chance of exploitation in the next 30 days.

Microsoft Communicator, and Communicator in Microsoft Office 2010 beta, allows remote attackers to cause a denial of service (memory consumption) via a large number of SIP INVITE requests, which trigger the creation of many sessions.

Affected products

• Microsoft Office Communicator: any version

Published 2008-11-20. Last modified 2026-06-16.