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Vulnerability · Published Nov 10, 2021 · Assigned by microsoft

CVE-2021-38666Remote Desktop Client Remote Code Execution Vulnerability

High 8.8

In plain English

A high-severity security flaw in Remote Desktop client for Windows Desktop from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 15.2% (higher than 97% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)15.2%top 3.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC

Official description

Remote Desktop Client Remote Code Execution Vulnerability

Affected products (as reported)

VendorProductVersions
Microsoft Remote Desktop client for Windows Desktop -
Microsoft Windows 10 Version 1507 10.0.10240.0 – before 10.0.10240.19119
Microsoft Windows 10 Version 1607 10.0.14393.0 – before 10.0.14393.4770
Microsoft Windows 10 Version 1809 10.0.17763.0 – before 10.0.17763.2300
Microsoft Windows 10 Version 1809 10.0.0 – before 10.0.17763.2300
Microsoft Windows 10 Version 1909 10.0.0 – before 10.0.18363.1916
Microsoft Windows 10 Version 2004 10.0.0 – before 10.0.19041.1348
Microsoft Windows 10 Version 20H2 10.0.0 – before 10.0.19042.1348
Microsoft Windows 10 Version 21H1 10.0.0 – before 10.0.19043.1348
Microsoft Windows 11 version 21H2 10.0.22000.0 – before 10.0.22000.318
Microsoft Windows 7 6.1.0 – before 6.1.7601.25769
Microsoft Windows 7 Service Pack 1 6.1.0 – before 6.1.7601.25769
Microsoft Windows 8.1 6.3.0 – before 6.3.9600.20174
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.0 – before 6.1.7601.25769
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 – before 6.1.7601.25769
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.0 – before 6.0.6003.21282
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0 – before 6.0.6003.21282
Microsoft Windows Server 2012 6.2.9200.0 – before 6.2.9200.23517
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 – before 6.2.9200.23517
Microsoft Windows Server 2012 R2 6.3.9600.0 – before 6.3.9600.20174
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 – before 6.3.9600.20174
Microsoft Windows Server 2016 10.0.14393.0 – before 10.0.14393.4770
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 – before 10.0.14393.4770
Microsoft Windows Server 2019 10.0.17763.0 – before 10.0.17763.2300
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 – before 10.0.17763.2300
Microsoft Windows Server 2022 10.0.20348.0 – before 10.0.20348.350
Microsoft Windows Server version 2004 10.0.0 – before 10.0.19041.1348
Microsoft Windows Server version 20H2 10.0.0 – before 10.0.19041.1348

References