High7.8Microsoft Server

High [CVE-2021-36973] Windows Redirected Drive Buffering System Elevation of Privilege Vulnerability

This high-severity Microsoft Server advisory covers CVE-2021-36973 affecting Windows Server 2016 (Server Core installation), Windows Server 2019 (Server Core installation), Windows Server 2022.

CVE-2021-36973 Published Sep 15, 2021Updated by vendor Aug 10, 2026

CVE-2021-36973

Affected products & platforms

Microsoft ServerWindows Server

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Summary

Windows Redirected Drive Buffering System Elevation of Privilege Vulnerability

Affected products named by the advisory: Windows Server 2016; Windows Server 2016 (Server Core installation); Windows Server 2019; Windows Server 2019 (Server Core installation); and 3 more.

Affected products named by the advisory: Windows Server 2022; Windows Server version 2004; Windows Server version 20H2.

Affected versions

Windows 10 Version 1507 10.0.10240.0 before 10.0.10240.19060
Windows 10 Version 1607 10.0.14393.0 before 10.0.14393.4651
Windows 10 Version 1809 10.0.17763.0 before 10.0.17763.2183
Windows 10 Version 1809 10.0.0 before 10.0.17763.2183
Windows 10 Version 1909 10.0.0 before 10.0.18363.1801
Windows 10 Version 2004 10.0.0 before 10.0.19041.1237
Windows 10 Version 20H2 10.0.0 before 10.0.19042.1237
Windows 10 Version 21H1 10.0.0 before 10.0.19043.1237
Windows Server 2016 10.0.14393.0 before 10.0.14393.4651
Windows Server 2016 (Server Core installation) 10.0.14393.0 before 10.0.14393.4651
Windows Server 2019 10.0.17763.0 before 10.0.17763.2183
Windows Server 2019 (Server Core installation) 10.0.17763.0 before 10.0.17763.2183

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Fixed versions

10.0.10240.19060
10.0.14393.4651
10.0.17763.2183
10.0.18363.1801
10.0.19041.1237
10.0.19042.1237
10.0.19043.1237
10.0.20348.230

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Mitigation

Upgrade to a fixed release: 10.0.10240.19060, 10.0.14393.4651, 10.0.17763.2183, 10.0.18363.1801, 10.0.19041.1237, 10.0.19042.1237. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Discussion(0)

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