CVE-2026-26166 :: 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

Base Score

CVSS 3.x

EPSS Score

Percentile: 19%

Affected Products (NVD)

Vendor	Product	Version
microsoft	windows_11_23h2	𝑥 < 10.0.22631.6936
microsoft	windows_11_23h2	𝑥 < 10.0.22631.6936
microsoft	windows_11_24h2	𝑥 < 10.0.26100.8246
microsoft	windows_11_24h2	𝑥 < 10.0.26100.8246
microsoft	windows_11_25h2	𝑥 < 10.0.26200.8246
microsoft	windows_11_25h2	𝑥 < 10.0.26200.8246
microsoft	windows_11_26h1	𝑥 < 10.0.28000.1836
microsoft	windows_11_26h1	𝑥 < 10.0.28000.1836
microsoft	windows_server_2022	𝑥 < 10.0.20348.5020
microsoft	windows_server_2022_23h2	𝑥 < 10.0.25398.2274
microsoft	windows_server_2025	𝑥 < 10.0.26100.32690

𝑥

= Vulnerable software versions

Windows Releases

Platform

Version

Windows 11

23H2 (arm64, x64)	KB5082052
24H2 (arm64, x64)	KB5083769
25H2 (arm64, x64)	KB5083769
26H1 (arm64, x64)	KB5083768

Windows Server 2022

23H2 Server Core	KB5082060
Server Core	KB5082142
Standard	KB5082142

Windows Server 2025

Server Core	KB5082063
Standard	KB5082063

Common Weakness Enumeration

CWE-415 - Double Free
The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26166