CVE-2026-20853

HIGH

Windows WalletService - Privilege Escalation

Title source: llm
STIX 2.1

Description

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

Scores

CVSS v3 7.4
EPSS 0.0002
EPSS Percentile 6.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-362
Status published
Products (15)
Microsoft/Windows 10 Version 1607 10.0.14393.0 - 10.0.14393.8783
Microsoft/Windows 10 Version 1809 10.0.17763.0 - 10.0.17763.8276
Microsoft/Windows 10 Version 21H2 10.0.19044.0 - 10.0.19044.6809
Microsoft/Windows 10 Version 22H2 10.0.19045.0 - 10.0.19045.6809
Microsoft/Windows 11 version 22H3 10.0.22631.0 - 10.0.22631.6491
Microsoft/Windows 11 Version 23H2 10.0.22631.0 - 10.0.22631.6491
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.7623
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.7623
microsoft/windows_10_1607 < 10.0.14393.8783 (2 CPE variants)
microsoft/windows_10_1809 < 10.0.17763.8276 (2 CPE variants)
... and 5 more
Published Jan 13, 2026
Tracked Since Feb 18, 2026