Advisory severityMedium5.5Vendor: HighMicrosoft Server

Medium [CVE-2026-83657] Windows Modern Device Management (MDM) Tampering Vulnerability

This medium-severity Microsoft Server advisory covers CVE-2026-83657 affecting Windows Server 2019.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-83657 Source published Oct 13, 2026Source updated Oct 13, 2026

VulniPulse record published Oct 13, 2026Record updated Oct 13, 2026

CVE-2026-83657

Affected products & platforms

Microsoft ServerWindows Server

Open source advisory

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Summary

Windows Modern Device Management (MDM) Tampering Vulnerability

Affected product named by the advisory: Windows Server 2019.

Affected versions

Windows 10 Version 1809 10.0.17763.0 before 10.0.17763.9376
Windows Server 2019 10.0.17763.0 before 10.0.17763.9376
Windows Server 2019 (Server Core installation) 10.0.17763.0 before 10.0.17763.9376

Official advisory · high-confidence parse· fetched 3 days ago·verify at source

Fixed versions

KB5126651 (build 10.0.17763.9376)

Official advisory · high-confidence parse· fetched 3 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Install the applicable security update for your platform: KB5126651 (see the Microsoft Update Catalog).

Official advisory · high-confidence parse· fetched 3 days ago·verify at source

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