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High7.8Microsoft Server

High [CVE-2026-41095] Data Deduplication Elevation of Privilege Vulnerability

This high-severity Microsoft Server advisory covers CVE-2026-41095 affecting Windows Server 2012 R2 (Server Core installation), Windows Server 2016 (Server Core installation), Windows Server 2019 (Server Core installation).

CVE-2026-41095 Published May 12, 2026Updated by vendor Aug 10, 2026
CVE-2026-41095
Affected products & platforms
Microsoft ServerWindows Server
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Summary

Use after free in Data Deduplication allows an authorized attacker to elevate privileges locally.

Affected products named by the advisory: Windows Server 2012 R2; Windows Server 2012 R2 (Server Core installation); Windows Server 2016; Windows Server 2016 (Server Core installation); and 6 more.

Affected products named by the advisory: Windows Server 2019 (Server Core installation); Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025 (Server Core installation).

Affected versions
  • Windows Server 2012 R2 6.3.9600.0 before 6.3.9600.23181
  • Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 before 6.3.9600.23181
  • Windows Server 2016 10.0.14393.0 before 10.0.14393.9140
  • Windows Server 2016 (Server Core installation) 10.0.14393.0 before 10.0.14393.9140
  • Windows Server 2019 10.0.17763.0 before 10.0.17763.8755
  • Windows Server 2019 (Server Core installation) 10.0.17763.0 before 10.0.17763.8755
  • Windows Server 2022 10.0.20348.0 before 10.0.20348.5139
  • Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 before 10.0.25398.2330
  • Windows Server 2025 10.0.26100.0 before 10.0.26100.32860
  • Windows Server 2025 (Server Core installation) 10.0.26100.0 before 10.0.26100.32860

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Fixed versions
  • 6.3.9600.23181
  • 10.0.14393.9140
  • 10.0.17763.8755
  • 10.0.20348.5139
  • 10.0.25398.2330
  • 10.0.26100.32860

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Mitigation

Upgrade to a fixed release: 6.3.9600.23181, 10.0.14393.9140, 10.0.17763.8755, 10.0.20348.5139, 10.0.25398.2330, 10.0.26100.32860. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Discussion(0)

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