Skip to content
CVE PROGRAM SOURCE RECORD7.0 High

CVE-2026-83999

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

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
microsoft

Description

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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Microsoft Windows 11 Version 24H2

  • 10.0.26100.0 to < 10.0.26100.9445affected

Microsoft Windows 11 Version 25H2

  • 10.0.26200.0 to < 10.0.26200.9445affected

Microsoft Windows 11 version 26H1

  • 10.0.28000.0 to < 10.0.28000.2954affected

Microsoft Windows Server 2025

  • 10.0.26100.0 to < 10.0.26100.33438affected

Microsoft Windows Server 2025 (Server Core installation)

  • 10.0.26100.0 to < 10.0.26100.33438affected

References