Description

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

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References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20921

Vendor Advisory

Weaknesses

[email protected]

Primary
CWE-362

CVSS impact metrics

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

7.5 · High

Information

Source identifier

[email protected]

Vulnerability status

Analyzed

Published

2026-01-13T18:16:18.463Z

2 days ago

Last modified

2026-01-15T21:15:37.230Z

3 hours ago