Repeat after me:
An owner voluntarily downgrading firmware to gain control of your hardware IS NOT A HACK.
And if an adversary is doing this, then they have already breached yoir physical security.
Eh, that’s a bad generalization. defense in depth is a thing and there are many cases where you’d want to protect against attackers with physical access
Arguably it’s a crack. A good one, though.
They shouldn’t be able to do it through the charging cable though lol