Even having the trainer's process running in the background while you launch the game could potentially trigger a ban. The official policy is extremely strict:
In the context of video games, a trainer is a software tool that modifies the game's behavior, typically to provide an advantage to the player. Trainers can offer features such as infinite ammo, health, or in-game currency. For Call of Duty: Black Ops Cold War, a trainer might include features like: call of duty black ops cold war pc trainer fling link