The registry in Windows NT can be accessed remotely by users who are not administrators.

.reg files are associated with the Windows NT registry editor (regedit), making the registry susceptible to Trojan Horse attacks.

A Windows NT system's user audit policy does not log an event success or failure, e.g. for Logon and Logoff, File and Object Access, Use of User Rights, User and Group Management, Security Policy Changes, Restart, Shutdown, and System, and Process Tracking.

A Windows NT system's file audit policy does not log an event success or failure for security-critical files or directories.

A Windows NT account policy has inappropriate, security-critical settings for lockout, e.g. lockout duration, lockout after bad logon attempts, etc.

Predictable TCP sequence numbers allow spoofing.