Race condition in Microsoft Windows - CVE-2026-20853
Published: January 13, 2026
Vulnerability identifier: #VU121261
CSH Severity: Low
CVSS v4: 7.5 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20853
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to escalate privileges on the system.
The vulnerability exists due to a race condition in Windows WalletService. A local attacker can exploit the race and escalate privileges on the system.
Affected software
Microsoft Windows
How to mitigate CVE-2026-20853
Install updates from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.6809, 10 22H2 10.0.19045.6809, 10 1607 10.0.14393.8783, 10 1809 10.0.17763.8276, 11 23H2 10.0.22631.6491, 11 24H2 10.0.26100.3223, 11 24H2 10.0.26100.7623