Improper Access Control in Windows HTTP.sys Affects Microsoft Products
CVE-2026-20929

7.5HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Vendor
CVE Published:
13 January 2026

What is CVE-2026-20929?

An improper access control vulnerability in Windows HTTP.sys can be exploited by an authorized attacker to gain elevated privileges over a network. This flaw potentially allows the attacker to execute commands, access sensitive information, and alter system settings, making it imperative for users to apply the latest security patches from Microsoft. Organizations should prioritize the remediation of this vulnerability to safeguard their systems against possible exploitation.

Affected Version(s)

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.8783

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.8276

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.6809

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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