CVE-2007-3436: Microsoft Msn Messenger

Medium severity, CVSS 5.0. EPSS: 12.7% chance of exploitation in the next 30 days.

Microsoft MSN Messenger 4.7 on Windows XP allows remote attackers to cause a denial of service (resource consumption) via a flood of SIP INVITE requests to the port specified for voice conversation.

Affected products

• Microsoft Msn Messenger: version 4.7 only

Published 2007-06-27. Last modified 2026-06-16.