CVE-2026-40405 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 60%

Affected Products (NVD)

Vendor	Product	Version
microsoft	windows_11_24h2	𝑥 < 10.0.26100.8390
microsoft	windows_11_24h2	𝑥 < 10.0.26100.8390
microsoft	windows_11_25h2	𝑥 < 10.0.26200.8390
microsoft	windows_11_25h2	𝑥 < 10.0.26200.8390
microsoft	windows_11_26h1	𝑥 < 10.0.28000.2113
microsoft	windows_11_26h1	𝑥 < 10.0.28000.2113
microsoft	windows_server_2025	𝑥 < 10.0.26100.32772

𝑥

= Vulnerable software versions

Windows Releases

Platform

Version

Windows 11

24H2 (arm64, x64)	KB5089549
25H2 (arm64, x64)	KB5089549
26H1 (arm64, x64)	KB5089548

Windows Server 2025

Server Core	KB5087539
Standard	KB5087539

Common Weakness Enumeration

CWE-476 - NULL Pointer Dereference
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40405