CVE-2026-83656: Windows Modern Device Management (MDM) Tampering Vulnerability
Missing authentication for critical function in Windows Modern Device Management (MDM) allows an authorized attacker to perform tampering locally.
Other sources
Windows Modern Device Management (MDM) Tampering Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker must already be authorized on the affected Windows system and must be able to act locally. The provided data does not indicate that remote exploitation is possible.
What is the likely security impact?
Successful exploitation allows tampering with Windows Modern Device Management functionality. The supplied vector indicates integrity impact only; no confidentiality or availability impact is specified.
Are Windows 10, Windows 11, and supported Windows Server systems in scope?
The affected software list includes Microsoft Windows 10, Windows 11, Windows Server 2022, and Windows Server 2025. The data does not identify specific builds, editions, or configuration conditions.