CVE-2026-20927

Medium · 5.3

CVSS

5.3

EPSS

0.9%

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 deny service over a network.

Affected packages

Ecosystem	Package	Introduced	Fixed