CTF Protocol Serves as a Low-Level Way to Take Over Windows Machines. It has been found to be insecure. Messages between windows in a session were being handled by “CTF”, which is buried as part of the Windows Text Services Framework. CTF can change the rails the program is running on in real time. But Ormandy found there was no access control in CTF. Any application, even a sandboxed process — can connect to any CTF session. If an app has a high level of privileges, the attacker may be able to take full control over a victim’s computer.”]