Windows Modern Device Management (MDM) Tampering Vulnerability

Summary

Details

Vulnerabilities 1

• Medium 5.5
  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.

  Microsoft Windows Server 2019 Windows Server 2019 (Server Core installation) Windows 10 Version 1809 Windows
  Oct 13, 2026

Revision history

1. 2026-10-13 #1

   Information published.

References

• CVE-2026-83657 Windows Modern Device Management (MDM) Tampering Vulnerability - HTML
  https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83657
• Microsoft Exploitability Index
  https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
• Microsoft Support Lifecycle
  https://support.microsoft.com/lifecycle
• Common Vulnerability Scoring System
  https://www.first.org/cvss