Microsoft Windows Secure Boot Protection Mechanism Bypass Vulnerability

A vulnerability allowing an authorized attacker to locally bypass the Secure Boot protection mechanism has been identified in various Microsoft Windows products. This issue arises from a failure in the protection mechanism, which could allow the attacker to undermine the Secure Boot security feature.

Impact

Exploitation of this vulnerability leads to a bypass of the Secure Boot feature, potentially allowing unauthorized modifications to the boot process or the loading of untrusted software.

Remediation

Users can apply the security update for this vulnerability, which is included in the June 2026 Monthly Rollup. Instructions for downloading this update are available on the Microsoft Update Catalog.