Microsoft’s Secure Boot has been broken for a decade and no one noticed until now

Recent findings reveal that Microsoft's Secure Boot, a security feature designed to prevent unauthorized software from loading during the boot process, has been vulnerable for over ten years. This issue stems from "shims," which are small pieces of code that allow for the loading of certain software. Microsoft failed to revoke these shims, making it easy for attackers to bypass Secure Boot protections.

The vulnerability raises significant concerns for users and businesses relying on this security feature to protect their systems from malware and other threats. Despite its critical role in safeguarding devices, the flaw remained unnoticed until now, highlighting potential weaknesses in Microsoft's security oversight.

As the tech community reacts to this revelation, experts are urging users to remain vigilant and consider additional security measures. The implications of this vulnerability could be far-reaching, affecting millions of devices globally.

Microsoft has yet to release a comprehensive response or a timeline for addressing the issue, leaving many users anxious about the security of their systems.

Source: arstechnica.com – https://arstechnica.com/security/2026/07/microsoft-secure-boot-has-been-broken-for-most-of-its-existence/