TL;DRA new BootROM vulnerability has been discovered in older iPhones using the A12 and A13 chips.It uses a hardware bug in the USB controller to gain access to an iPhone’s startup process.It can’t be patched, and the only way to mitigate it is to switch to a device with a newer processor.iPhones are not immune to vulnerabilities and exploits. They’ve previously suffered hardware-level exploits like checkm8, and widespread, easy-to-use ones like DarkSword. Now, researchers have found and exploited a new hardware-level BootROM vulnerability on iPhones.Researchers at Paradigm Shift published an extremely detailed post explaining the “usbliter8” exploit, which leverages a hardware bug in the USB controller and a firmware configuration flaw.