PT-2026-2731 · Microsoft · Windows Smb Server+1

Published 2026-01-13 · Updated 2026-01-13 · CVE-2026-20926

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/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 using shared resources. This allows an authorized attacker to potentially elevate privileges over a network.

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

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

BDU:2026-00504

CVE-2026-20926

Affected Products

Windows

Windows Smb Server

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-20926 · Security Note
• https://osv.dev/vulnerability/CVE-2026-20926 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20926 · Security Note
• https://bdu.fstec.ru/vul/2026-00504 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20926 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20926 · Vendor Advisory
• https://twitter.com/CVEnew/status/2011181544778711393 · Twitter Post
• https://cybersecurity-help.cz/vulnerabilities/121267 · Note