> CVE-2026-83999 Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability

[SOURCE] Microsoft Security Update Guide [DATE: 08/09/2026 14:00] [LANGUAGE: EN]

Improper link resolution before file access ('link following') in Windows Resilient File System (ReFS) Deduplication Service allows an authorized attacker to elevate privileges locally.

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