CVE-2002-0072: Microsoft Internet Information Server

Medium severity, CVSS 5.0. EPSS: 56.6% chance of exploitation in the next 30 days.

The w3svc.dll ISAPI filter in Front Page Server Extensions and ASP.NET for Internet Information Server (IIS) 4.0, 5.0, and 5.1 does not properly handle the error condition when a long URL is provided, which allows remote attackers to cause a denial of service (crash) when the URL parser accesses a null pointer.

Affected products

• Microsoft Internet Information Server: version 4.0 only
• Microsoft Internet Information Services: version 5.0 only

Published 2002-04-22. Last modified 2026-06-16.