These low-level systems can be good attack vectors, on our computer systems if you can attack the BIOS (Intel ME or AMD PSP) it doesn't matter much what defense

These low-level systems can be good attack vectors, on our computer systems if you can attack the BIOS (Intel ME or AMD PSP) it doesn't matter much what defenses the operating system has. Luckily, most of our computers aren't easily remotely connectable, but phone modems are another story.