CVE-2005-1987: Microsoft Exchange Server

High severity, CVSS 7.5. EPSS: 44.5% chance of exploitation in the next 30 days.

Buffer overflow in Collaboration Data Objects (CDO), as used in Microsoft Windows and Microsoft Exchange Server, allows remote attackers to execute arbitrary code when CDOSYS or CDOEX processes an e-mail message with a large header name, as demonstrated using the "Content-Type" string.

Affected products

• Microsoft Exchange Server: version 2000 only
• Microsoft Windows 2000: affected versions not specified
• Microsoft Windows Server 2003: affected versions not specified; version r2 only; version sp1 only
• Microsoft Windows XP: affected versions not specified

Published 2005-10-13. Last modified 2026-06-16.