CVE-2026-83657: Windows Modern Device Management (MDM) Tampering Vulnerability
Weak authentication 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 10.0.17763.9376Patch KB5126651
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
The attacker must already be authorized and have local access to the affected system. The available data does not indicate that remote or unauthenticated exploitation is possible.
What is the expected impact if the vulnerability is exploited?
Successful exploitation allows tampering with Windows Modern Device Management. The supplied severity metrics indicate an integrity impact, with no stated confidentiality or availability impact.
Which systems are identified as affected?
The listed affected software is Microsoft Windows Server 2019 and Microsoft Windows 10. No further edition, build, or update applicability details are provided.