Microsoft has released a patch that eliminates a security vulnerability in Microsoft Windows NT 4.0 servers that provide secure remote sessions. The vulnerability could allow an attacker to prevent an affected machine from providing useful service.

Frequently asked questions regarding this vulnerability and the patch can be found at http://www.microsoft.com/technet/security/bulletin/fq01-009.asp

Affected Software Versions
Microsoft Windows NT 4.0 Server
Microsoft Windows NT 4.0 Server, Enterprise Edition
Microsoft Windows NT 4.0 Server, Terminal Server Edition

Patch Availability
Windows NT 4.0 Server and Windows NT 4.0 Server, Enterprise Edition:
http://www.microsoft.com/Downloads/Release.asp?ReleaseID=27836
Windows NT 4.0 Server, Terminal Server Edition:
To be released shortly

Note: This patch can be applied to systems running Windows NT 4.0 Service Pack 6a. The fix will be included in Windows NT 4.0 Service Pack 7.