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News and resources from the Airoverflow team - offensive security, threat research, and web application hacking.

Advisory

CVE-2026-69379: TOCTOU in ReFsDedupSvc Enables Arbitrary File Overwrite as SYSTEM

A process-wide SE_RESTORE_PRIVILEGE and a destination lock released four operations too early. Neither is a bug on its own; chained, they let a standard user overwrite TrustedInstaller-owned files in System32.

September 13, 2026AirOverflow
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