Race Condition Vulnerability in Windows WalletService
CVE-2026-20853

7.4HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1809
Windows 10 Version 21h2
Windows 10 Version 22h2
Windows 11 Version 25h2
Vendor
CVE Published:
13 January 2026

What is CVE-2026-20853?

A race condition vulnerability in Windows WalletService allows unauthorized users to elevate their privileges due to improper synchronization in concurrent execution of shared resources. This flaw can lead to potential unauthorized access to sensitive information or functionality, emphasizing the need for timely remediation to maintain system security.

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:
7.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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