CVE-2026-20853

Windows WalletService Elevation of Privilege Vulnerability

CVSS 7.4 HIGHEPSS 0.3%CWE-362

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.4EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

13 Jan 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

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

Affected products

Microsoft · Windows 10 Version 1607 Microsoft · Windows 10 Version 1809 Microsoft · Windows 10 Version 21H2 Microsoft · Windows 10 Version 22H2 Microsoft · Windows 11 version 22H3 Microsoft · Windows 11 Version 23H2 Microsoft · Windows 11 Version 24H2 Microsoft · Windows 11 Version 25H2

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References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20853