CVE-2002-0155: Microsoft Msn Chat Control

High severity, CVSS 7.5. EPSS: 24.1% chance of exploitation in the next 30 days.

Buffer overflow in Microsoft MSN Chat ActiveX Control, as used in MSN Messenger 4.5 and 4.6, and Exchange Instant Messenger 4.5 and 4.6, allows remote attackers to execute arbitrary code via a long ResDLL parameter in the MSNChat OCX.

Affected products

• Microsoft Msn Chat Control: any version
• Microsoft Msn Messenger: version 4.5 only; version 4.6 only
• Microsoft Msn Messenger Service For Exchange: version 4.5 only; version 4.6 only

Published 2002-05-29. Last modified 2026-06-16.