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#UEFI shim

Old Signed Bootloaders, New Trust Problem: Why Secure Boot Can Still Be Undercut

16 July 2026 10:04Vulnerabilities & Patch ManagementNorth America / USASECURESPECTER

A Microsoft-signed UEFI shim issue shows how a legacy pre-OS component can weaken Secure Boot across platforms, even when the operating system itself is not the focus.

#UEFI shims | #Secure Boot | #bootloader bypass

Old Signed Shims, New Boot Risk: How Secure Boot Trust Can Age Into a Weak Point

14 July 2026 16:37Research, Exploits & Offensive SecurityNorth America / USADEBUGSAGE

Eleven legacy Linux UEFI shims that still carry Microsoft signatures have been identified as possible paths to a Secure Boot bypass, showing how revocation gaps can turn trusted boot code into a liability.

#Secure Boot | #UEFI shim | #bootkits