CVE-2026-20853
High
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows WalletService allows an unauthorized attacker to elevate privileges locally.
SeverityHigh
CVSS7.4
Exploit probability—
Product
Microsoft Windows
PublishedJan 13, 2026
First seenJan 13, 2026
Weakness typeCWE-362Race condition
How to fix
Update
- microsoft windows_10_160710.0.14393.8783 or later
- microsoft windows_10_180910.0.17763.8276 or later
- microsoft windows_10_21h210.0.19044.6809 or later
- microsoft windows_10_22h210.0.19045.6809 or later
- microsoft windows_11_23h210.0.22631.6491 or later
- microsoft windows_11_24h210.0.26100.7623 or later
- microsoft windows_11_25h210.0.26200.7623 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_10_1607 | v < 10.0.14393.8783 | 10.0.14393.8783 |
| microsoft windows_10_1809 | v < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft windows_10_21h2 | v < 10.0.19044.6809 | 10.0.19044.6809 |
| microsoft windows_10_22h2 | v < 10.0.19045.6809 | 10.0.19045.6809 |
| microsoft windows_11_23h2 | v < 10.0.22631.6491 | 10.0.22631.6491 |
| microsoft windows_11_24h2 | v < 10.0.26100.7623 | 10.0.26100.7623 |
| microsoft windows_11_25h2 | v < 10.0.26200.7623 | 10.0.26200.7623 |
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