Microsoft’s Secure Boot Illusion: A Decade of Vulnerability
A significant security oversight has revealed that Microsoft's Secure Boot has been bypassable for nearly its entire existence. The vulnerability centers on shims—Microsoft-signed components intended to facilitate the loading of non-Windows operating systems—that contain known flaws. Because Microsoft failed to invalidate these legacy shims, attackers can exploit them to load malicious bootkits that execute before the operating system, rendering standard security software useless. This lapse highlights a systemic failure in the chain of trust that was supposed to protect billions of devices from firmware-level attacks.