VulnerabilitiesJul 15, 2026
Forgotten Bootloaders Expose Secure Boot Blind Spot
Vulnerable UEFI shim bootloaders bypassed Secure Boot for years.
Summary
Researchers discovered that nearly a dozen UEFI shim bootloaders, which are crucial for the Secure Boot process, were vulnerable and remained trusted for years. These vulnerabilities allowed attackers to bypass Secure Boot, a critical security feature designed to prevent malicious software from loading during the boot process. The affected bootloaders have since been revoked.
Entities
UEFI shim bootloaders (technology)Secure Boot (technology)