The Terminal Server in Microsoft Windows 2003 Server, when using TLS, allows remote attackers to bypass SSL and self-signed certificate requirements, downgrade the server security, and possibly conduct man-in-the-middle attacks via unspecified vectors, as demonstrated using the Remote Desktop Protocol (RDP) 6.0 client. NOTE: a third party claims that the vendor may have fixed this in approximately 2006.

Windows NT Terminal Server performs extra work when a client opens a new connection but before it is authenticated, allowing for a denial of service.

Multihomed Windows systems allow a remote attacker to bypass IP source routing restrictions via a malformed packet with IP options, aka the "Spoofed Route Pointer" vulnerability.

Microsoft TCP/IP Printing Services, aka Print Services for Unix, allows an attacker to cause a denial of service via a malformed TCP/IP print request.

The default permissions for the Cryptography\Offload registry key used by the OffloadModExpo in Windows NT 4.0 allows local users to obtain compromise the cryptographic keys of other users.

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.

Buffer overflow in Microsoft command processor (CMD.EXE) for Windows NT and Windows 2000 allows a local user to cause a denial of service via a long environment variable, aka the "Malformed Environment Variable" vulnerability.

The CIFS Computer Browser service allows remote attackers to cause a denial of service by sending a ResetBrowser frame to the Master Browser, aka the "ResetBrowser Frame" vulnerability.

Memory leak in Terminal servers in Windows NT and Windows 2000 allows remote attackers to cause a denial of service (memory exhaustion) via a large number of malformed Remote Desktop Protocol (RDP) requests to port 3389.

Microsoft Terminal Server, when running an application session with the "Start program at logon" and "Override settings from user profile and Client Connection Manager wizard" options, allows local users to execute arbitrary code by forcing an Explorer error. NOTE: a third-party researcher has stated that the options are "a convenience to users" and were not intended to restrict execution of arbitrary code

Windows 95, Windows 98, Windows 2000, Windows NT 4.0, and Terminal Server systems allow a remote attacker to cause a denial of service by sending a large number of identical fragmented IP packets, aka jolt2 or the "IP Fragment Reassembly" vulnerability.