No, I am not talking about the nuclear meltdown in the USSR in 1986, but rather the rampant virus, that could potentially "meltdown" your BIOS, released in 1999, ironically 13 years to the day after the actual meltdown.
I don't know how far back some of you go, but back than, a BIOS was not removable with a simple extraction tool. Nor was flashing a BIOS an easy feat. The BIOS chip itself was saudered to the MotherBoard and everything was configured with jumpers...
The good ol' days. Even back than, they found ways to "sneak in" to your BIOS. Nowadays... you can download and Executable payload from companies like DELL amongst others, where you simply double click and it flashes the BIOS for you. No user interaction required (unless there is a BIOS pw).
Using that principal alone, and knowing that the manufacturer uses multiple MB manufacturers, who in turn use different chips (AMI, Phoenix, etc.) it's not very hard to get the code necessary to do the flash from a "vulnerable" machine.
Sometimes, when they try to make things "user friendly" they are really" opening a door to every hacker, craker, phreaker, script kiddy, etc. out there...