CVE-2005-4360: Microsoft Internet Information Services

High severity, CVSS 7.8. EPSS: 86.7% chance of exploitation in the next 30 days.

The URL parser in Microsoft Internet Information Services (IIS) 5.1 on Windows XP Professional SP2 allows remote attackers to execute arbitrary code via multiple requests to ".dll" followed by arguments such as "~0" through "~9", which causes ntdll.dll to produce a return value that is not correctly handled by IIS, as demonstrated using "/_vti_bin/.dll/*/~0". NOTE: the consequence was originally believed to be only a denial of service (application crash and reboot).

Affected products

• Microsoft Internet Information Services: version 5.1 only

Published 2005-12-20. Last modified 2026-06-16.