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

Awaiting analysis

This vulnerability is currently awaiting analysis.

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

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.

Vulnerability Media Exposure

[ENGLISH] Microsoft May 2026 Patch Tuesday fixes 120 flaws, no zero-days
Today is Microsoft's May 2026 Patch Tuesday, with security updates for 120 flaws and no zero-days disclosed this month. [...]
Published: 2026-05-12T14:08:06-04:00

References

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