The main question here is are you talking about 3.3.5 branch or about the 7.x branch?
As far as i know TrinityCore has done a realy good work on "Warden Anticheat" for the 3.3.5 Branch, but i dont know, or even not expect, this working on 7.x.
This Anticheat is far from being complete but its the way Blizz do cheat dedection.
Some other anticheat systems are validating movement and many more stuff on server (speed / fly hack / ecc.) but this was never integrated in the repository.
There are patchs around in the custom section.