CVE-2026-20926

HIGH

Windows SMB Server - Privilege Escalation

Title source: llm

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.

References (1)

Scores

CVSS v3 7.5
EPSS 0.0005
EPSS Percentile 16.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Classification

CWE
CWE-362
Status published

Affected Products (16)

microsoft/windows_10_1607 < 10.0.14393.8783
microsoft/windows_10_1607 < 10.0.14393.8783
microsoft/windows_10_1809 < 10.0.17763.8276
microsoft/windows_10_1809 < 10.0.17763.8276
microsoft/windows_10_21h2 < 10.0.19044.6809
microsoft/windows_10_22h2 < 10.0.19045.6809
microsoft/windows_11_23h2 < 10.0.22631.6491
microsoft/windows_11_24h2 < 10.0.26100.7623
microsoft/windows_11_25h2 < 10.0.26200.7623
microsoft/windows_server_2012
microsoft/windows_server_2012
microsoft/windows_server_2016 < 10.0.14393.8783
microsoft/windows_server_2019 < 10.0.17763.8276
microsoft/windows_server_2022 < 10.0.20348.4648
microsoft/windows_server_2022_23h2 < 10.0.25398.2092
... and 1 more

Timeline

Published Jan 13, 2026
Tracked Since Feb 18, 2026