There’s usually a jumper you can set on the motherboard that controls whether you can reflash firmware. So you can burn Coreboot and set it back. Also if someo

There’s usually a jumper you can set on the motherboard that controls whether you can reflash firmware. So you can burn Coreboot and set it back. Also if someone can flash your firmware your security (on the software or physical access side) is already busted and it’s game over anyway.