CVE-2026-21234 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7 HIGH	LOCAL	HIGH	LOW	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
microsoft	CNA	7 HIGH				CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Base Score

CVSS 3.x

EPSS Score

Percentile: 3%

Affected Products (NVD)

Vendor	Product	Version
microsoft	windows_10_1809	𝑥 < 10.0.17763.8389
microsoft	windows_10_1809	𝑥 < 10.0.17763.8389
microsoft	windows_10_21h2	𝑥 < 10.0.19044.6937
microsoft	windows_10_21h2	𝑥 < 10.0.19044.6937
microsoft	windows_10_21h2	𝑥 < 10.0.19044.6937
microsoft	windows_10_22h2	𝑥 < 10.0.19045.6937
microsoft	windows_10_22h2	𝑥 < 10.0.19045.6937
microsoft	windows_10_22h2	𝑥 < 10.0.19045.6937
microsoft	windows_11_23h2	𝑥 < 10.0.22631.6649
microsoft	windows_11_23h2	𝑥 < 10.0.22631.6649
microsoft	windows_11_24h2	𝑥 < 10.0.26100.7781
microsoft	windows_11_24h2	𝑥 < 10.0.26100.7781
microsoft	windows_11_25h2	𝑥 < 10.0.26200.7781
microsoft	windows_11_25h2	𝑥 < 10.0.26200.7781
microsoft	windows_server_2019	𝑥 < 10.0.17763.8389
microsoft	windows_server_2022	𝑥 < 10.0.20348.4711
microsoft	windows_server_2022_23h2	𝑥 < 10.0.25398.2149
microsoft	windows_server_2025	𝑥 < 10.0.26100.32313

𝑥

= Vulnerable software versions

Windows Releases

Platform

Version

Windows 10

1809 (x64, x86)	KB5075904
21H2 (arm64, x64, x86)	KB5075912
22H2 (arm64, x64, x86)	KB5075912

Windows 11

23H2 (arm64, x64)	KB5075941
24H2 (arm64, x64)	KB5077212
25H2 (arm64, x64)	KB5077212
26H1 (arm64, x64)	KB5077179

Windows Server 2019

Server Core	KB5075904
Standard	KB5075904

Windows Server 2022

23H2 Server Core	KB5075897
Server Core	KB5075943
Standard	KB5075943

Windows Server 2025

Server Core	KB5075942
Standard	KB5075942

Common Weakness Enumeration

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
The program contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21234