The range safety officer has a button that they can press. I'm not sure if the rocket can do it on its own as well. Somewhat amusingly, the Russians do not us

The range safety officer has a button that they can press. I'm not sure if the rocket can do it on its own as well. Somewhat amusingly, the Russians do not use these systems. They launch from the desert in Kazakhstan, so they just let their rockets crash and burn.