CVE-2004-1134: Microsoft w3who.dll

High severity, CVSS 10.0. EPSS: 72.3% chance of exploitation in the next 30 days.

Buffer overflow in the Microsoft W3Who ISAPI (w3who.dll) allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long query string.

Affected products

• Microsoft w3who.dll: any version

Published 2005-01-10. Last modified 2026-06-16.