CVE-2026-20927 MEDIUM

CVE-2026-20927: Windows SMB Server Denial of Service Vulnerability

Vendor Microsoft
Product Windows 10 Version 1607
Weakness CWE-362
Published January 13, 2026
Last update April 1, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

January 13, 2026 CVE published
April 1, 2026 Record updated