CVE-2026-20921
High · 7.5CVSS
7.5
EPSS
1.2%
Published
Jan 13, 2026
CISA due date
—
The record
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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