Secure Boot has a major security issue — hundreds of devices from Dell, Supermicro and more all affected, here's what we know

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A supply chain vulnerability, present in hundreds of devices from numerous vendors, has been discovered after hiding in plain sight for 12 years. 

The PKfail vulnerability revolves around a test Secure Boot “master key” which if abused, can grant threat actors the ability to completely take over the vulnerable endpoints, and install malware and other dangerous code as they see fit.