CVE-2026-20864 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.8 HIGH	LOCAL	LOW	LOW	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
microsoft	CNA	7.8 HIGH				CVSS:3.1/AV:L/AC:L/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: 8%

Affected Products (NVD)

Vendor	Product	Version
microsoft	windows_10_1809	𝑥 < 10.0.17763.8276
microsoft	windows_10_1809	𝑥 < 10.0.17763.8276
microsoft	windows_10_21h2	𝑥 < 10.0.19044.6809
microsoft	windows_10_22h2	𝑥 < 10.0.19045.6809
microsoft	windows_11_23h2	𝑥 < 10.0.22631.6491
microsoft	windows_11_24h2	𝑥 < 10.0.26100.7623
microsoft	windows_11_25h2	𝑥 < 10.0.26200.7623
microsoft	windows_server_2019	𝑥 < 10.0.17763.8276
microsoft	windows_server_2022	𝑥 < 10.0.20348.4648
microsoft	windows_server_2022_23h2	𝑥 < 10.0.25398.2092
microsoft	windows_server_2025	𝑥 < 10.0.26100.32230

𝑥

= Vulnerable software versions

Windows Releases

Platform

Version

Windows 10

1809 (x64, x86)	KB5073723
21H2 (arm64, x64, x86)	KB5073724
22H2 (arm64, x64, x86)	KB5073724

Windows 11

23H2 (arm64, x64)	KB5073455
24H2 (arm64, x64)	KB5074109
25H2 (arm64, x64)	KB5074109

Windows Server 2019

Server Core	KB5073723
Standard	KB5073723

Windows Server 2022

23H2 Server Core	KB5073450
Server Core	KB5073457
Standard	KB5073457

Windows Server 2025

Server Core	KB5073379
Standard	KB5073379

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-2026-20864