Microsoft Windows Secure Boot Bypass Confirmed — Update Now
The second Tuesday of every month is always a busy one for users of the Microsoft Windows operating system, for it is then when the monthly security rollout happens. Truth be told, Patch Tuesday is less important than Exploit Wednesday; now, threat actors are aware of the confirmed vulnerabilities, and the race is on between attackers and those who would defend against them. We've already seen reports of a zero-day threat to all Windows users, where the attacks started some months ago, and while there are no known exploits of CVE-2025-3052 in the wild, that's no reason to take it any less seriously. Why so? Because this is a Secure Boot bypass that could open up your system to further attacks and compromise.
I always get a bit jittery whenever I hear of a new vulnerability that can enable a bypass of the Windows Secure Boot protections. I don't really need to explain why, do I? Suffice to say, Secure Boot is what stops your Windows device from loading insecure operating system images during boot-up. You know, the kind of backdoors that cybercriminals and surveillance states would just love to drop in there.
Anyhoo. Please excuse my jitters, then, as I reveal that security researchers at Binarly Research managed to uncover just such a vulnerability impacting the Secure Boot process. Classified by the Common Vulnerabilities and Exposures database as CVE-2025-3052, this one's a doozy: it is capable of turning the protections off and allowing malware to be installed on your Windows PCs and servers.
CVE-2025-3052 would appear to impact most devices that support the Unified Extensible Firmware Interface. It is a memory corruption issue that sits within a module signed with Microsoft's third-party UEFI certificate and can be exploited to run unsigned code during the boot process.
'Because the attacker's code executes before the operating system even loads,' the Binarly Research report said, 'it opens the door for attackers to install bootkits and undermine OS-level security defenses.'
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