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CVE-2026-47291

HTTP.sys Remote Code Execution Vulnerability

Published
Last modified
Status
published
Known exploitation
Not listed in CISA KEV
Fix
Fixed in 10.0.14393.9234, 10.0.17763.8880, 10.0.19044.7417, 10.0.19045.7417, 10.0.22631.7219, and 7 more
Public exploit
None on Exploit-DB
CISA SSVC
  • Exploitation: none
  • Automatable: yes
  • Technical impact: total
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Decision points from CISA's Vulnrichment, assessed (SSVC 2.0.3).

SSVC documentation

Summary

Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code over a network.

Affected versions

  • Microsoft Windows 10 Version 1607

    From 10.0.14393.0 · fixed in 10.0.14393.9234

  • Microsoft Windows 10 Version 1809

    From 10.0.17763.0 · fixed in 10.0.17763.8880

  • Microsoft Windows 10 Version 21H2

    From 10.0.19044.0 · fixed in 10.0.19044.7417

  • Microsoft Windows 10 Version 22H2

    From 10.0.19045.0 · fixed in 10.0.19045.7417

  • Microsoft Windows 11 version 23H2

    From 10.0.22631.0 · fixed in 10.0.22631.7219

  • Microsoft Windows 11 Version 23H2

    From 10.0.22631.0 · fixed in 10.0.22631.7219

  • Microsoft Windows 11 Version 24H2

    From 10.0.26100.0 · fixed in 10.0.26100.8655

  • Microsoft Windows 11 Version 25H2

    From 10.0.26200.0 · fixed in 10.0.26200.8655

  • Microsoft Windows 11 version 26H1

    From 10.0.28000.0 · fixed in 10.0.28000.2269

  • Microsoft Windows Server 2012

    From 6.2.9200.0 · fixed in 6.2.9200.26132

  • Microsoft Windows Server 2012 (Server Core installation)

    From 6.2.9200.0 · fixed in 6.2.9200.26132

  • Microsoft Windows Server 2012 R2

    From 6.3.9600.0 · fixed in 6.3.9600.23228

  • Microsoft Windows Server 2012 R2 (Server Core installation)

    From 6.3.9600.0 · fixed in 6.3.9600.23228

  • Microsoft Windows Server 2016

    From 10.0.14393.0 · fixed in 10.0.14393.9234

  • Microsoft Windows Server 2016 (Server Core installation)

    From 10.0.14393.0 · fixed in 10.0.14393.9234

  • Microsoft Windows Server 2019

    From 10.0.17763.0 · fixed in 10.0.17763.8880

  • Microsoft Windows Server 2019 (Server Core installation)

    From 10.0.17763.0 · fixed in 10.0.17763.8880

  • Microsoft Windows Server 2022

    From 10.0.20348.0 · fixed in 10.0.20348.5256

  • Microsoft Windows Server 2025

    From 10.0.26100.0 · fixed in 10.0.26100.32995

  • Microsoft Windows Server 2025 (Server Core installation)

    From 10.0.26100.0 · fixed in 10.0.26100.32995

References 1

msrc.microsoft.com