Security researchers who discovered and reported CVE-2026-54121 (aka “Certighost”), a critical privilege elevation vulnerability in Active Directory Certificate Services (AD CS), have released a proof-of-concept (PoC) exploit for and technical details related to the flaw. The vulnerability AD CS is a Microsoft Windows Server role that lets an organization run its own Public Key Infrastructure (PKI). It acts as a Certificate Authority (CA), issuing and managing digital certificates used for authentication, encryption, and signing across … More
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