CVE-2026-20927

CVE Database · CVE-2026-20927

CVE-2026-20927

· MEDIUMAnalyzed

CVSS v3.1

5.3

EPSS

0.89%

Published

Jan 13, 2026

Modified

Jan 16, 2026

Public PoC / Exploit

All weaponized →

No public PoC or exploit code indexed for this CVE.

Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to deny service over a network.

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-362

Affected Products (19)

microsoft · windows_10_1607 (up to 10.0.14393.8783)vulnerable

microsoft · windows_10_1809 (up to 10.0.17763.8276)vulnerable

microsoft · windows_10_21h2 (up to 10.0.19044.6809)vulnerable

microsoft · windows_10_22h2 (up to 10.0.19045.6809)vulnerable

microsoft · windows_11_23h2 (up to 10.0.22631.6491)vulnerable

microsoft · windows_11_24h2 (up to 10.0.26100.7623)vulnerable

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20927

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