CVE-2026-96855
Undergoing Analysis Undergoing Analysis - In Progress

Improper Access Control in Windows MDM Allows Local Tampering

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description
Improper access control in Windows Modern Device Management (MDM) allows an authorized attacker to perform tampering locally.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-16
Generated
2026-10-19
AI Q&A
2026-10-14
EPSS Evaluated
2026-10-18
NVD
CVE-2026-96855
EUVD
EUVD-2026-99779

Affected Vendors & Products

Showing 14 associated CPEs
Vendor Product Version / Range
Microsoft Windows 10 Version 1809 10.0.17763.0
Microsoft Windows 10 Version 21H2 10.0.19044.0
Microsoft Windows 10 Version 22H2 10.0.19045.0
Microsoft Windows 11 version 23H2 10.0.22631.0
Microsoft Windows 11 Version 23H2 10.0.22631.0
Microsoft Windows 11 Version 24H2 10.0.26100.0
Microsoft Windows 11 Version 25H2 10.0.26200.0
Microsoft Windows 11 version 26H1 10.0.28000.0
Microsoft Windows 11 Version 26H2 10.0.26300.0
Microsoft Windows Server 2019 10.0.17763.0
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0
Microsoft Windows Server 2022 10.0.20348.0
Microsoft Windows Server 2025 10.0.26100.0
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

This vulnerability is an improper access control issue in Windows Modern Device Management (MDM). An authorized attacker with local access can exploit it to perform tampering actions on the system.

Impact Analysis

An attacker could modify system settings or configurations locally, potentially leading to unauthorized changes, data corruption, or bypassing security controls.

Compliance Impact

This vulnerability allows local tampering via improper access control in Windows MDM, which could lead to unauthorized modifications of system configurations or data. Such tampering risks violating compliance requirements under GDPR (data integrity) and HIPAA (system integrity and audit controls) by enabling unauthorized changes to sensitive systems or data.

Mitigation Strategies

Apply the latest security updates from Microsoft to address the improper access control in Windows MDM. Monitor Microsoft's advisory for patches and follow their guidance for affected systems.

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