CVE-1999-0366: Microsoft Windows Nt

High severity, CVSS 7.5. EPSS: 3.7% chance of exploitation in the next 30 days.

In some cases, Service Pack 4 for Windows NT 4.0 can allow access to network shares using a blank password, through a problem with a null NT hash value.

Affected products

• Microsoft Windows Nt: version 4.0 only

Published 1999-02-08. Last modified 2026-06-16.