CVE-1999-1148: Microsoft Internet Information Server

Medium severity, CVSS 5.0. EPSS: 17.3% chance of exploitation in the next 30 days.

FTP service in IIS 4.0 and earlier allows remote attackers to cause a denial of service (resource exhaustion) via many passive (PASV) connections at the same time.

Affected products

• Microsoft Internet Information Server: up to and including 4.0

Published 1999-12-31. Last modified 2026-06-16.