CVE-1999-0861: Microsoft Commercial Internet System

Low severity, CVSS 2.6. EPSS: 3.2% chance of exploitation in the next 30 days.

Race condition in the SSL ISAPI filter in IIS and other servers may leak information in plaintext.

Affected products

• Microsoft Commercial Internet System: version 2.0 only; version 2.5 only
• Microsoft Internet Information Server: version 4.0 only
• Microsoft Site Server: version 3.0 only
• Microsoft Site Server Commerce: version 3.0 only

Published 1999-08-11. Last modified 2026-06-16.