CVE-2026-77503 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	8.4 HIGH	LOCAL	LOW	NONE	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 25.85%

Affected Products (NVD)

Vendor	Product	Version
microsoft	windows_10_1607	𝑥 < 10.0.14393.9512
microsoft	windows_10_1809	𝑥 < 10.0.17763.9245
microsoft	windows_10_21h2	𝑥 < 10.0.19044.7725
microsoft	windows_10_22h2	𝑥 < 10.0.19045.7725
microsoft	windows_11_23h2	𝑥 < 10.0.22631.7582
microsoft	windows_11_24h2	𝑥 < 10.0.26100.9445
microsoft	windows_11_25h2	𝑥 < 10.0.26200.9445
microsoft	windows_11_26h1	𝑥 < 10.0.28000.2954
microsoft	windows_server_2012	-
microsoft	windows_server_2016	𝑥 < 10.0.14393.9512
microsoft	windows_server_2019	𝑥 < 10.0.17763.9245
microsoft	windows_server_2022	𝑥 < 10.0.20348.5622
microsoft	windows_server_2025	𝑥 < 10.0.26100.33438

𝑥

= Vulnerable software versions

Windows Releases

Platform

Version

Windows 10

1607 (x64, x86)	KB5123099
1809 (x64, x86)	KB5122876
21H2 (arm64, x64, x86)	KB5122878
22H2 (arm64, x64, x86)	KB5122878

Windows 11

23H2 (arm64, x64)	KB5122880
24H2 (arm64, x64)	KB5124008
25H2 (arm64, x64)	KB5124008
26H1 (arm64, x64)	KB5124012

Windows Server 2012

Server Core	KB5123065
Standard	KB5123065

Windows Server 2012 R2

Server Core	KB5123066
Standard	KB5123066

Windows Server 2016

Server Core	KB5123099
Standard	KB5123099

Windows Server 2019

Server Core	KB5122876
Standard	KB5122876

Windows Server 2022

Server Core	KB5122882
Standard	KB5122882

Windows Server 2025

Server Core	KB5122871
Standard	KB5122871

Common Weakness Enumeration

CWE-125 - Out-of-bounds Read
The software reads data past the end, or before the beginning, of the intended buffer.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77503