2 theory :
one:
this happened in the warden on wow : They could update it without having to update wow.
It's internal, and gathering informations.
two:
It's just gathering information. Then it's processed to a server which tells if anything is legit or is not.
You don't need any update
Eventually, if you need to update the game to do a minor update on the anticheat, you're doing it wrong.