PT-2026-2732 · Microsoft · Windows Smb Server+1

Published 2026-01-13 · Updated 2026-01-13 · CVE-2026-20927

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows SMB Server (affected versions not specified)

Description A race condition exists in Windows SMB Server due to improper synchronization when handling concurrent execution with shared resources. This allows an authorized attacker to cause a denial of service over a network.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

BDU:2026-00392

CVE-2026-20927

Affected Products

Windows

Windows Smb Server

References · 7

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20927 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-20927 · Security Note
• https://osv.dev/vulnerability/CVE-2026-20927 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20927 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20927 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00392 · Security Note
• https://twitter.com/CVEnew/status/2011181543717580939 · Twitter Post