Microsoft Secure Boot Vulnerability Found After a Decade
Originally published Jul 14, 2026
By Dan Goodin · Ars Technica
AI-generated summary based on Ars Technica · Aggregated by OffScreenSpace · Human-reviewed and approved on Jul 14, 2026
Key points
- A flaw in Microsoft's Secure Boot system has existed for over ten years.
- Unrevoked 'shims' have allowed bypasses of Secure Boot protections.
- The vulnerability was only recently discovered despite its long presence.
- Secure Boot is intended to block unauthorized software during system startup.
A flaw in Microsoft's Secure Boot system has existed for over ten years. The issue stems from unrevoked 'shims' that allow bypasses. The vulnerability went unnoticed until recently. Secure Boot is designed to prevent unauthorized software from loading during startup. This discovery raises concerns about system security.
Read the original story: Ars Technica — by Dan Goodin