CVE-2026-20853

Windows WalletService Elevation of Privilege Vulnerability

State: Published
Severity: 7.4 High
Published: Jan 13, 2026
Updated: Jul 30, 2026
Reserved: Dec 3, 2025

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows WalletService allows an unauthorized attacker to elevate privileges locally.

Scores

CVSS	Score	Vector	Source
3.1	7.4 High	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Products

Product	Versions
Windows 10 Version 1607Microsoft	10.0.14393.0 to before 10.0.14393.8783Affected
Windows 10 Version 1809Microsoft	10.0.17763.0 to before 10.0.17763.8276Affected
Windows 10 Version 21H2Microsoft	10.0.19044.0 to before 10.0.19044.6809Affected
Windows 10 Version 22H2Microsoft	10.0.19045.0 to before 10.0.19045.6809Affected
Windows 11 version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.6491Affected
Windows 11 Version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.6491Affected
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.7623Affected
Windows 11 Version 25H2Microsoft	10.0.26200.0 to before 10.0.26200.7623Affected

References

Windows WalletService Elevation of Privilege Vulnerabilityvendor-advisorypatch

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