I have memories of this sort of thing going on back in the early 2000s with DirecTV access cards. One of the methods was to glitch the access card processor during bootup by pulsing and otherwise messing with the power. IIRC, it could be put into a test or debug mode if it was timed right.

On one hand I'd expect most systems that take security seriously would defend against this, but on the other hand the pitiful state of mass market and consumer hardware would indicate that very low expectations would be appropriate.