Windows System Secure Feature Bypass Vulnerability

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-50418
StatePUBLISHED
Assignermicrosoft
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-14 18:17:44 UTC
Updated2026-07-22 16:17:53 UTC
DescriptionImproper access control in Windows System allows an unauthorized attacker to bypass a security feature locally.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

EPSS: 0.001960000 probability, percentile 0.096160000 (date 2026-07-22)

Problem Types: CWE-284 | CWE-284 CWE-284: Improper Access Control

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.1MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
3.1[email protected]Secondary5.1MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
3.1CNACVSS5.1MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Microsoft Windows 11 24h2 All All All All
Operating System Microsoft Windows 11 24h2 All All All All
Operating System Microsoft Windows 11 25h2 All All All All
Operating System Microsoft Windows 11 25h2 All All All All
Operating System Microsoft Windows 11 26h1 All All All All
Operating System Microsoft Windows 11 26h1 All All All All
Operating System Microsoft Windows Server 2022 All All All All
Operating System Microsoft Windows Server 2025 All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Microsoft Windows 11 Version 24H2 affected 10.0.26100.0 10.0.26100.8875 custom ARM64-based Systems, x64-based Systems
CNA Microsoft Windows 11 Version 25H2 affected 10.0.26200.0 10.0.26200.8875 custom ARM64-based Systems, x64-based Systems
CNA Microsoft Windows 11 Version 26H1 affected 10.0.28000.0 10.0.28000.2525 custom ARM64-based Systems, x64-based Systems
CNA Microsoft Windows Server 2022 affected 10.0.20348.0 10.0.20348.5386 custom x64-based Systems
CNA Microsoft Windows Server 2025 affected 10.0.26100.0 10.0.26100.33158 custom x64-based Systems
CNA Microsoft Windows Server 2025 Server Core Installation affected 10.0.26100.0 10.0.26100.33158 custom x64-based Systems

References

ReferenceSourceLinkTags
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50418 [email protected] msrc.microsoft.com Patch, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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