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Security releases

Microsoft

Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability

CVE-2026-83586 Oct 13, 2026 Source: Vendor
Source of record The credited names below are quoted verbatim from the vendor's own advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83586
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Credited

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CVE-2026-83586 BR2026-0003-023388 unclaimed
Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability
Credited as HeeChan Kim with TeamH4C