Race Condition Vulnerability in Windows Management Services by Microsoft
CVE-2026-20867

7.8HIGH

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-2026-20867?

A race condition vulnerability exists in Windows Management Services due to improper synchronization when managing shared resources. This flaw allows an authorized attacker to exploit the vulnerability locally, enabling unauthorized privilege escalation. It is crucial for users to apply security updates to mitigate potential exploitation and protect sensitive data.

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Affected Version(s)

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

Windows 10 Version 22H2 x64-based Systems 10.0.19045.0 < 10.0.19045.6809

References

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

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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