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CVE-2026-56194

Windows NFS Server Elevation of Privilege Vulnerability

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 10.0.14393.9339, 10.0.17763.9020, 10.0.19044.7548, 10.0.19045.7548, 10.0.26100.8875, and 6 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

Heap-based buffer overflow in Windows Network File System allows an authorized attacker to elevate privileges over a network.

Timeline

  1. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  2. CVE published
  3. Record last updated

Affected versions

  • Microsoft Windows 10 Version 1607

    From 10.0.14393.0 · fixed in 10.0.14393.9339

  • Microsoft Windows 10 Version 1809

    From 10.0.17763.0 · fixed in 10.0.17763.9020

  • Microsoft Windows 10 Version 21H2

    From 10.0.19044.0 · fixed in 10.0.19044.7548

  • Microsoft Windows 10 Version 22H2

    From 10.0.19045.0 · fixed in 10.0.19045.7548

  • Microsoft Windows 11 Version 24H2

    From 10.0.26100.0 · fixed in 10.0.26100.8875

  • Microsoft Windows 11 Version 25H2

    From 10.0.26200.0 · fixed in 10.0.26200.8875

  • Microsoft Windows 11 version 26H1

    From 10.0.28000.0 · fixed in 10.0.28000.2525

  • Microsoft Windows Server 2012

    From 6.2.9200.0 · fixed in 6.2.9200.26226

  • Microsoft Windows Server 2012 (Server Core installation)

    From 6.2.9200.0 · fixed in 6.2.9200.26226

  • Microsoft Windows Server 2012 R2

    From 6.3.9600.0 · fixed in 6.3.9600.23291

  • Microsoft Windows Server 2012 R2 (Server Core installation)

    From 6.3.9600.0 · fixed in 6.3.9600.23291

  • Microsoft Windows Server 2016

    From 10.0.14393.0 · fixed in 10.0.14393.9339

  • Microsoft Windows Server 2016 (Server Core installation)

    From 10.0.14393.0 · fixed in 10.0.14393.9339

  • Microsoft Windows Server 2019

    From 10.0.17763.0 · fixed in 10.0.17763.9020

  • Microsoft Windows Server 2019 (Server Core installation)

    From 10.0.17763.0 · fixed in 10.0.17763.9020

  • Microsoft Windows Server 2022

    From 10.0.20348.0 · fixed in 10.0.20348.5386

  • Microsoft Windows Server 2025

    From 10.0.26100.0 · fixed in 10.0.26100.33158

  • Microsoft Windows Server 2025 (Server Core installation)

    From 10.0.26100.0 · fixed in 10.0.26100.33158

References 1

msrc.microsoft.com