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Google details fixed Windows privilege escalation flaw

Google Project Zero has described how a recent Windows security update addressed a privilege escalation vulnerability known as CVE-2026-66804. The flaw involved a system-wide COM object registration that allowed attackers to place a malicious DLL in a directory accessible by any user, potentially letting them gain elevated privileges. Fourteen researchers reported the issue, which was connected to an incomplete fix for a previous vulnerability.

Why it mattersPrivilege escalation flaws can allow attackers to gain higher-level access on systems, potentially leading to broader exploitation or sensitive data exposure. The public disclosure highlights the need for careful review of incomplete security patches.

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Google Project ZeroPrimaryWindows Exploitation Techniques: Dangling COM Object Registrations7:00 AM →

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