Microsoft blocks UEFI bootloaders enabling Windows Secure Boot bypass

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Some signed third-party bootloaders for the Unified Extensible Firmware Interface (UEFI) could allow attackers to execute unauthorized code in an early stage of the boot process, before the operating system loads

Vendor-specific bootloaders used by Windows were found to be vulnerable while the status of almost a dozen others is currently unknown.

Microsoft blocks UEFI bootloaders enabling Windows Secure Boot bypass

It appears that Microsoft has started to block Windows ISO downloads that originate from Rufus. Rufus is a popular open source tool to create bootable media.

You can no longer download Windows 11, 10 ISOs via Rufus as Microsoft blocks Fido
 
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