UEFI BIOS embedded Shell can be used to bypass Secure Boot

HighVendor CVSS 8.2 / 10 1 CVE Published Sep 11, 2026 at 1:02 AM UTC

Summary

Mariner

See the Microsoft Security Update Guide for the update that applies to your product.

Sep 11, 2026 at 1:02 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Sep 11, 2026 at 8:05 AM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Oct 28, 2026 at 3:45 AM UTC
Confirmed at the source
Our collector saw this advisory during a later source check.

Details collected from Microsoft Security Response Center.

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