A would-be hacker needs low-level OS access to get in, so you at least won't face a direct assault -- you need to fall prey to another attack before this becomes an option. However, this vulnerability might be difficult or impossible to fix in a timely fashion. While it's theoretically possible to patch a computer's BIOS (or on relatively recent systems, UEFI) to prevent these attacks, the chances of that happening are slim. What's the likelihood that your motherboard maker will support a product that's at least 5 years old, or that most people are both willing and able to apply firmware upgrades? Not very high, we'd reckon. Although the inexorable march of time will eventually take care of this flaw, the only surefire solution is to upgrade your computer.