CVE-1999-0450: Microsoft Internet Information Server

High severity, CVSS 7.5. EPSS: 19% chance of exploitation in the next 30 days.

In IIS, an attacker could determine a real path using a request for a non-existent URL that would be interpreted by Perl (perl.exe).

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 1999-01-26. Last modified 2026-06-16.