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CVE-2026-20929— Windows HTTP.sys Elevation of Privilege Vulnerability

CVSS 7.5 · High EPSS 1.14% · P63

Affected Version Matrix 20

VendorProductVersion RangeStatus
MicrosoftWindows 10 Version 160710.0.14393.0< 10.0.14393.8783affected
MicrosoftWindows 10 Version 180910.0.17763.0< 10.0.17763.8276affected
MicrosoftWindows 10 Version 21H210.0.19044.0< 10.0.19044.6809affected
MicrosoftWindows 10 Version 22H210.0.19045.0< 10.0.19045.6809affected
MicrosoftWindows 11 version 23H210.0.22631.0< 10.0.22631.6491affected
MicrosoftWindows 11 Version 23H210.0.22631.0< 10.0.22631.6491affected
MicrosoftWindows Server 2008 R2 Service Pack 16.1.7601.0< 6.1.7601.28117affected
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)6.1.7601.0< 6.1.7601.28117affected
MicrosoftWindows Server 2008 Service Pack 26.0.6003.0< 6.0.6003.23717affected
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)6.0.6003.0< 6.0.6003.23717affected
MicrosoftWindows Server 20126.2.9200.0< 6.2.9200.25868affected
MicrosoftWindows Server 2012 (Server Core installation)6.2.9200.0< 6.2.9200.25868affected
MicrosoftWindows Server 2012 R26.3.9600.0< 6.3.9600.22968affected
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.0< 6.3.9600.22968affected
MicrosoftWindows Server 201610.0.14393.0< 10.0.14393.8783affected
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0< 10.0.14393.8783affected
MicrosoftWindows Server 201910.0.17763.0< 10.0.17763.8276affected
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0< 10.0.17763.8276affected
MicrosoftWindows Server 202210.0.20348.0< 10.0.20348.4648affected
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)10.0.25398.0< 10.0.25398.2092affected
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I. Basic Information for CVE-2026-20929

Vulnerability Information
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Vulnerability Title
Windows HTTP.sys Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft HTTP.sys 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft HTTP.sys是美国微软（Microsoft）公司的一个HTTP应用协议。 Microsoft HTTP.sys存在访问控制错误漏洞。攻击者利用该漏洞可以提升权限。以下产品和版本受到影响：Windows 10 Version 21H2 for x64-based Systems,Windows 10 Version 22H2 for x64-based Systems,Windows 10 Version 22H2 for ARM64-based Systems,Windows 10
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
MicrosoftWindows 10 Version 1607 10.0.14393.0 ~ 10.0.14393.8783 -
MicrosoftWindows 10 Version 1809 10.0.17763.0 ~ 10.0.17763.8276 -
MicrosoftWindows 10 Version 21H2 10.0.19044.0 ~ 10.0.19044.6809 -
MicrosoftWindows 10 Version 22H2 10.0.19045.0 ~ 10.0.19045.6809 -
MicrosoftWindows 11 version 23H2 10.0.22631.0 ~ 10.0.22631.6491 -
MicrosoftWindows 11 Version 23H2 10.0.22631.0 ~ 10.0.22631.6491 -
MicrosoftWindows Server 2008 R2 Service Pack 1 6.1.7601.0 ~ 6.1.7601.28117 -
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 ~ 6.1.7601.28117 -
MicrosoftWindows Server 2008 Service Pack 2 6.0.6003.0 ~ 6.0.6003.23717 -
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0 ~ 6.0.6003.23717 -
MicrosoftWindows Server 2012 6.2.9200.0 ~ 6.2.9200.25868 -
MicrosoftWindows Server 2012 (Server Core installation) 6.2.9200.0 ~ 6.2.9200.25868 -
MicrosoftWindows Server 2012 R2 6.3.9600.0 ~ 6.3.9600.22968 -
MicrosoftWindows Server 2012 R2 (Server Core installation) 6.3.9600.0 ~ 6.3.9600.22968 -
MicrosoftWindows Server 2016 10.0.14393.0 ~ 10.0.14393.8783 -
MicrosoftWindows Server 2016 (Server Core installation) 10.0.14393.0 ~ 10.0.14393.8783 -
MicrosoftWindows Server 2019 10.0.17763.0 ~ 10.0.17763.8276 -
MicrosoftWindows Server 2019 (Server Core installation) 10.0.17763.0 ~ 10.0.17763.8276 -
MicrosoftWindows Server 2022 10.0.20348.0 ~ 10.0.20348.4648 -
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 ~ 10.0.25398.2092 -

II. Public POCs for CVE-2026-20929

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III. Intelligence Information for CVE-2026-20929

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Same Patch Batch · Microsoft · 2026-01-13 · 112 CVEs total

CVE-2026-209639.8 CRITICALMicrosoft SharePoint Remote Code Execution Vulnerability
CVE-2026-209478.8 HIGHMicrosoft SharePoint Server Remote Code Execution Vulnerability
CVE-2026-208688.8 HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
CVE-2026-209528.4 HIGHMicrosoft Office Remote Code Execution Vulnerability
CVE-2026-209538.4 HIGHMicrosoft Office Remote Code Execution Vulnerability
CVE-2026-209448.4 HIGHMicrosoft Word Remote Code Execution Vulnerability
CVE-2026-208568.1 HIGHWindows Server Update Service (WSUS) Remote Code Execution Vulnerability
CVE-2026-209318.0 HIGHWindows Telephony Service Elevation of Privilege Vulnerability
CVE-2026-208587.8 HIGHWindows Management Services Elevation of Privilege Vulnerability
CVE-2026-212247.8 HIGHAzure Connected Machine Agent Elevation of Privilege Vulnerability
CVE-2026-208377.8 HIGHWindows Media Remote Code Execution Vulnerability
CVE-2026-209567.8 HIGHMicrosoft Excel Remote Code Execution Vulnerability
CVE-2026-209557.8 HIGHMicrosoft Excel Remote Code Execution Vulnerability
CVE-2026-208407.8 HIGHWindows NTFS Remote Code Execution Vulnerability
CVE-2026-209517.8 HIGHMicrosoft SharePoint Server Remote Code Execution Vulnerability
CVE-2026-209467.8 HIGHMicrosoft Excel Remote Code Execution Vulnerability
CVE-2026-208577.8 HIGHWindows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
CVE-2026-209187.8 HIGHWindows Management Services Elevation of Privilege Vulnerability
CVE-2026-209237.8 HIGHWindows Management Services Elevation of Privilege Vulnerability
CVE-2026-209207.8 HIGHWin32k Elevation of Privilege Vulnerability

Showing top 20 of 112 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Windows 10 Version 1607
Same vendor: Microsoft
Same weakness: CWE-284

V. Comments for CVE-2026-20929

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