Race Condition Vulnerability in Windows Connected Devices Platform Service by Microsoft
CVE-2026-21234

7HIGH

Key Information:

Vendor

Microsoft
Status
Windows 11 Version 26h1
Windows 11 Version 26h1
Windows 10 Version 1809
Windows Server 2019
Vendor
CVE Published:
10 February 2026

What is CVE-2026-21234?

A privilege escalation vulnerability exists in the Windows Connected Devices Platform Service due to improper synchronization when accessing shared resources. An attacker with local access can exploit this flaw to execute concurrent processes in a manner that allows them to elevate their privileges, potentially leading to unauthorized actions on the affected system. Ensuring timely updates and patches is essential to safeguard against such vulnerabilities.

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Affected Version(s)

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.8389

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.6937

Windows 10 Version 22H2 x64-based Systems 10.0.19045.0 < 10.0.19045.6937

References

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

CVSS V3.1

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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