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CVE-2021-31186— Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability

Quick assessment

Affected

Microsoft Windows 10 Version 1803

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Remote Desktop Protocol Client是美国微软（Microsoft）公司的一款应用于连接远程桌面的客户端软件。 Windows RDP Client 存在信息泄露漏洞。以下产品和版本受到影响：Windows Server 2019 (Server Core installation),Windows 10 Version 1909 for 32-bit Systems,Windows 10 Version 1909 for x64-based Systems,W

CVSS 7.4 · High EPSS 2.97% · P87 Updated Feb 25, 2026

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

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I. Basic Information for CVE-2021-31186

Vulnerability Information

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Vulnerability Title

Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability

Source: CVE Program / CVE List V5

Vulnerability Description

Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Vulnerability Title

Microsoft Remote Desktop Protocol Client 信息泄露漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE
Microsoft	Windows 10 Version 1803	10.0.0 ~ 10.0.17134.2207	`cpe:2.3:o:microsoft:windows_10_1809:10.0.17134.2207::::::x64:`
Microsoft	Windows 10 Version 1809	10.0.0 ~ 10.0.17763.1935	`cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.1935::::::x86:`
Microsoft	Windows Server 2019	10.0.0 ~ 10.0.17763.1935	`cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.1935:::::::*`
Microsoft	Windows Server 2019 (Server Core installation)	10.0.0 ~ 10.0.17763.1935	`cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.1935:::::::*`
Microsoft	Windows 10 Version 1909	10.0.0 ~ 10.0.18363.1556	`cpe:2.3:o:microsoft:windows_10_1909:10.0.18363.1556::::::x86:`
Microsoft	Windows Server, version 1909 (Server Core installation)	10.0.0 ~ 10.0.18363.1556	`cpe:2.3:o:microsoft:windows_server_1909:10.0.18363.1556:::::::*`
Microsoft	Windows 10 Version 2004	10.0.0 ~ 10.0.19041.982	`cpe:2.3:o:microsoft:windows_10_1809:10.0.19041.982::::::x64:`
Microsoft	Windows Server version 2004	10.0.0 ~ 10.0.19041.982	`cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.982:::::::*`
Microsoft	Windows 10 Version 20H2	10.0.0 ~ 10.0.19042.982	`cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.982::::::x86:`
Microsoft	Windows Server version 20H2	10.0.0 ~ 10.0.19042.982	`cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.982:::::::*`
Microsoft	Windows 10 Version 1507	10.0.0 ~ 10.0.10240.18931	`cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.18931::::::x86:`
Microsoft	Windows 10 Version 1607	10.0.0 ~ 10.0.14393.4401	`cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4401::::::x86:`
Microsoft	Windows Server 2016	10.0.0 ~ 10.0.14393.4401	`cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4401:::::::*`
Microsoft	Windows Server 2016 (Server Core installation)	10.0.0 ~ 10.0.14393.4401	`cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4401:::::::*`
Microsoft	Windows 7	6.1.0 ~ 6.1.7601.24597	`cpe:2.3:o:microsoft:windows_7:6.1.7601.24597:sp1:::::x86:*`
Microsoft	Windows 7 Service Pack 1	6.1.0 ~ 6.1.7601.24597	`cpe:2.3:o:microsoft:windows_7:6.1.7601.24597:sp1:::::x64:*`
Microsoft	Windows 8.1	6.3.0 ~ 6.3.9600.20017	`cpe:2.3:o:microsoft:windows_8.1:6.3.9600.20017::::::x86:`
Microsoft	Windows Server 2008 Service Pack 2	6.0.0 ~ 6.0.6003.21117	`cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21117::::::x64:`
Microsoft	Windows Server 2008 Service Pack 2 (Server Core installation)	6.0.0 ~ 6.0.6003.21117	`cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21117::::::x64:`
Microsoft	Windows Server 2008 Service Pack 2	6.0.0 ~ 6.0.6003.21117	`cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21117::::::x86:`
Microsoft	Windows Server 2008 R2 Service Pack 1	6.1.0 ~ 6.1.7601.24597	`cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.24597::::::x64:`
Microsoft	Windows Server 2008 R2 Service Pack 1 (Server Core installation)	6.0.0 ~ 6.1.7601.24597	`cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.24597::::::x64:`
Microsoft	Windows Server 2012	6.2.0 ~ 6.2.9200.23347	`cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23347::::::x64:`
Microsoft	Windows Server 2012 (Server Core installation)	6.2.0 ~ 6.2.9200.23347	`cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23347::::::x64:`
Microsoft	Windows Server 2012 R2	6.3.0 ~ 6.3.9600.20017	`cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20017::::::x64:`
Microsoft	Windows Server 2012 R2 (Server Core installation)	6.3.0 ~ 6.3.9600.20017	`cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20017::::::x64:`

II. Public POCs for CVE-2021-31186

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2021-31186

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Vendor Advisories for CVE-2021-31186 (1)

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31186 x_refsource_MISC

https://www.cve.org/CVERecord?id=CVE-2021-31186

Same Patch Batch · Microsoft · 2021-05-11 · 52 CVEs total

CVE-2021-28476	9.9 CRITICAL	Windows Hyper-V Remote Code Execution Vulnerability
CVE-2021-31166	9.8 CRITICAL	HTTP Protocol Stack Remote Code Execution Vulnerability
CVE-2021-27068	8.8 HIGH	Visual Studio Remote Code Execution Vulnerability
CVE-2021-28455	8.8 HIGH	Microsoft Jet Red Database Engine and Access Connectivity Engine Remote Code Execution Vul
CVE-2021-31181	8.8 HIGH	Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2021-28474	8.8 HIGH	Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2021-31194	8.8 HIGH	OLE Automation Remote Code Execution Vulnerability
CVE-2021-28465	7.8 HIGH	Web Media Extensions Remote Code Execution Vulnerability
CVE-2021-31169	7.8 HIGH	Windows Container Manager Service Elevation of Privilege Vulnerability
CVE-2021-31211	7.8 HIGH	Visual Studio Code Remote Code Execution Vulnerability
CVE-2021-31187	7.8 HIGH	Windows WalletService Elevation of Privilege Vulnerability
CVE-2021-31165	7.8 HIGH	Windows Container Manager Service Elevation of Privilege Vulnerability
CVE-2021-31167	7.8 HIGH	Windows Container Manager Service Elevation of Privilege Vulnerability
CVE-2021-31180	7.8 HIGH	Microsoft Office Graphics Remote Code Execution Vulnerability
CVE-2021-31168	7.8 HIGH	Windows Container Manager Service Elevation of Privilege Vulnerability
CVE-2021-31179	7.8 HIGH	Microsoft Office Remote Code Execution Vulnerability
CVE-2021-31177	7.8 HIGH	Microsoft Office Remote Code Execution Vulnerability
CVE-2021-31175	7.8 HIGH	Microsoft Office Remote Code Execution Vulnerability
CVE-2021-31176	7.8 HIGH	Microsoft Office Remote Code Execution Vulnerability
CVE-2021-31170	7.8 HIGH	Windows Graphics Component Elevation of Privilege Vulnerability

Showing top 20 of 52 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Windows 10 Version 1803

Same vendor: Microsoft

V. Comments for CVE-2021-31186

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2021-31186— Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability

Quick assessment

Possible ATT&CK Techniques 1 AI

I. Basic Information for CVE-2021-31186

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2021-31186

III. Intelligence Information for CVE-2021-31186

Vendor Advisories for CVE-2021-31186 (1)

Same Patch Batch · Microsoft · 2021-05-11 · 52 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2021-31186

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