Local users in Windows NT can obtain administrator privileges by changing the KnownDLLs list to reference malicious programs.

The installer for BackOffice Server includes account names and passwords in a setup file (reboot.ini) which is not deleted.

The cryptographic challenge of SMB authentication in Windows 95 and Windows 98 can be reused, allowing an attacker to replay the response and impersonate a user.

Denial of service in telnet from the Windows NT Resource Kit, by opening then immediately closing a connection.

The Forms 2.0 ActiveX control (included with Visual Basic for Applications 5.0) can be used to read text from a user's clipboard when the user accesses documents with ActiveX content.

Windows NT automatically logs in an administrator upon rebooting.

A system-critical Windows NT file or directory has inappropriate permissions.

Windows NT is not using a password filter utility, e.g. PASSFILT.DLL.

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

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

A Windows NT system's registry audit policy does not log an event success or failure for non-critical registry keys.

The HKEY_CLASSES_ROOT key in a Windows NT system has inappropriate, system-critical permissions.

The default setting for the Winlogon key entry ShutdownWithoutLogon in Windows NT allows users with physical access to shut down a Windows NT system without logging in.

TCP/IP implementation in Microsoft Windows 95, Windows NT 4.0, and possibly others, allows remote attackers to reset connections by forcing a reset (RST) via a PSH ACK or other means, obtaining the target's last sequence number from the resulting packet, then spoofing a reset to the target.

A Windows NT domain user or administrator account has a guessable password.

A Windows NT domain user or administrator account has a default, null, blank, or missing password.

The Windows NT guest account is enabled.

The Windows NT RPC service allows remote attackers to conduct a denial of service using spoofed malformed RPC packets which generate an error message that is sent to the spoofed host, potentially setting up a loop, aka Snork.

The WINS server in Microsoft Windows NT 4.0 before SP4 allows remote attackers to cause a denial of service (process termination) via invalid UDP frames to port 137 (NETBIOS Name Service), as demonstrated via a flood of random packets.

NT users can gain debug-level access on a system process using the Sechole exploit.