Secure Boot, a critical security feature designed to ensure that a device boots using only software that is trusted by the Original Equipment Manufacturer (OEM), has been completely compromised on over 200 models from major device manufacturers including Acer, Dell, Gigabyte, Intel, and Supermicro. The breach is attributed to a cryptographic key leak that occurred in 2022, where the platform key was leaked on GitHub. The repository containing the private portion of the platform key was encrypted, but it was protected by a weak four-character password. According to Binarly, an additional 300 more models use keys marked 'DO NOT TRUST'. This vulnerability undermines the security of the UEFI ecosystem and raises concerns about the integrity of the software supply chain across the industry.