CVE-2000-0649: Microsoft Internet Information Server

Low severity, CVSS 2.6. EPSS: 76.6% chance of exploitation in the next 30 days.

IIS 4.0 allows remote attackers to obtain the internal IP address of the server via an HTTP 1.0 request for a web page which is protected by basic authentication and has no realm defined.

Affected products

• Microsoft Internet Information Server: version 3.0 only; version 4.0 only
• Microsoft Internet Information Services: version 2.0 only; version 5.0 only

Published 2000-07-13. Last modified 2026-06-16.