CVE-2001-0506: Microsoft Internet Information Server

High severity, CVSS 7.2. EPSS: 68.9% chance of exploitation in the next 30 days.

Buffer overflow in ssinc.dll in IIS 5.0 and 4.0 allows local users to gain system privileges via a Server-Side Includes (SSI) directive for a long filename, which triggers the overflow when the directory name is added, aka the "SSI privilege elevation" vulnerability.

Affected products

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

Published 2001-09-20. Last modified 2026-06-16.