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CVE-2026-21244

Windows Hyper-V Remote Code Execution Vulnerability

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 10.0.14393.8868, 10.0.17763.8389, 10.0.19044.6937, 10.0.19045.6937, 10.0.22631.6649, and 6 more
1 on Exploit-DB
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.

Timeline

  1. CVE published
  2. CISA SSVC assessment

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

  3. Public exploit on Exploit-DB

    EDB-52537

  4. Record last updated

Affected versions

  • Microsoft Windows 10 Version 1607

    From 10.0.14393.0 · fixed in 10.0.14393.8868

  • Microsoft Windows 10 Version 1809

    From 10.0.17763.0 · fixed in 10.0.17763.8389

  • Microsoft Windows 10 Version 21H2

    From 10.0.19044.0 · fixed in 10.0.19044.6937

  • Microsoft Windows 10 Version 22H2

    From 10.0.19045.0 · fixed in 10.0.19045.6937

  • Microsoft Windows 11 version 22H3

    From 10.0.22631.0 · fixed in 10.0.22631.6649

  • Microsoft Windows 11 Version 23H2

    From 10.0.22631.0 · fixed in 10.0.22631.6649

  • Microsoft Windows 11 Version 24H2

    From 10.0.26100.0 · fixed in 10.0.26100.7840

  • Microsoft Windows 11 Version 25H2

    From 10.0.26200.0 · fixed in 10.0.26200.7840

  • Microsoft Windows 11 version 26H1

    From 10.0.28000.0 · fixed in 10.0.28000.1575

  • Microsoft Windows 11 Version 26H1

    From 10.0.28000.0 · fixed in 10.0.28000.1575

  • Microsoft Windows Server 2016

    From 10.0.14393.0 · fixed in 10.0.14393.8868

  • Microsoft Windows Server 2016 (Server Core installation)

    From 10.0.14393.0 · fixed in 10.0.14393.8868

  • Microsoft Windows Server 2019

    From 10.0.17763.0 · fixed in 10.0.17763.8389

  • Microsoft Windows Server 2019 (Server Core installation)

    From 10.0.17763.0 · fixed in 10.0.17763.8389

  • Microsoft Windows Server 2022

    From 10.0.20348.0 · fixed in 10.0.20348.4773

  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)

    From 10.0.25398.0 · fixed in 10.0.25398.2149

  • Microsoft Windows Server 2025

    From 10.0.26100.0 · fixed in 10.0.26100.32370

  • Microsoft Windows Server 2025 (Server Core installation)

    From 10.0.26100.0 · fixed in 10.0.26100.32370

References 2

msrc.microsoft.com

Exploit-DB