CVE-2026-40403 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	8.8 HIGH	LOCAL	LOW	LOW	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 34%

Affected Products (NVD)

Vendor	Product	Version
microsoft	windows_10_1607	𝑥 < 10.0.14393.9140
microsoft	windows_10_1607	𝑥 < 10.0.14393.9140
microsoft	windows_10_1809	𝑥 < 10.0.17763.8755
microsoft	windows_10_1809	𝑥 < 10.0.17763.8755
microsoft	windows_10_21h2	𝑥 < 10.0.19044.7291
microsoft	windows_10_21h2	𝑥 < 10.0.19044.7291
microsoft	windows_10_21h2	𝑥 < 10.0.19044.7291
microsoft	windows_10_22h2	𝑥 < 10.0.19045.7291
microsoft	windows_10_22h2	𝑥 < 10.0.19045.7291
microsoft	windows_10_22h2	𝑥 < 10.0.19045.7291
microsoft	windows_11_23h2	𝑥 < 10.0.22631.7079
microsoft	windows_11_23h2	𝑥 < 10.0.22631.7079
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_2012	-
microsoft	windows_server_2016	𝑥 < 10.0.14393.9140
microsoft	windows_server_2019	𝑥 < 10.0.17763.8755
microsoft	windows_server_2022	𝑥 < 10.0.20348.5074
microsoft	windows_server_2022_23h2	𝑥 < 10.0.25398.2330
microsoft	windows_server_2025	𝑥 < 10.0.26100.32772

𝑥

= Vulnerable software versions

Windows Releases

Platform

Version

Windows 10

1607 (x64, x86)	KB5087537
1809 (x64, x86)	KB5087538
21H2 (arm64, x64, x86)	KB5087544
22H2 (arm64, x64, x86)	KB5094127

Windows 11

23H2 (arm64)	KB5087420
23H2 (x64)	KB5093998
24H2 (arm64, x64)	KB5089549
25H2 (arm64, x64)	KB5089549
26H1 (arm64, x64)	KB5089548

Windows Server 2012

Server Core	KB5087470
Standard	KB5087470

Windows Server 2012 R2

Server Core	KB5087471
Standard	KB5087471

Windows Server 2016

Server Core	KB5087537
Standard	KB5087537

Windows Server 2019

Server Core	KB5087538
Standard	KB5087538

Windows Server 2022

23H2 Server Core	KB5087541
Server Core	KB5087545
Standard	KB5087545

Windows Server 2025

Server Core	KB5087539
Standard	KB5087539

Common Weakness Enumeration

CWE-122 - Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40403