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CVE-2021-40469— Windows DNS Server Remote Code Execution Vulnerability

Quick assessment

Affected

Microsoft Windows Server 2019

Exploitation

High exploitation probability; assess promptly

Recommended action

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

Microsoft DNS Server是美国微软（Microsoft）公司的一个服务。 Microsoft DNS Server 存在代码注入漏洞。以下产品和版本受到影响：Windows Server 2016,Windows Server 2016 (Server Core installation),Windows Server 2008 for 32-bit Systems Service Pack 2,Windows Server 2008 for 32-bit Systems Service

CVSS 7.2 · High EPSS 7.58% · P94 Updated Feb 25, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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I. Basic Information for CVE-2021-40469

Vulnerability Information

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Vulnerability Title

Windows DNS Server Remote Code Execution Vulnerability

Source: CVE Program / CVE List V5

Vulnerability Description

Windows DNS Server Remote Code Execution Vulnerability

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Vulnerability Title

Microsoft DNS Server 代码注入漏洞

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 Server 2019	10.0.0 ~ 10.0.17763.2237	`cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2237:::::::*`
Microsoft	Windows Server 2019 (Server Core installation)	10.0.0 ~ 10.0.17763.2237	`cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2237:::::::*`
Microsoft	Windows Server 2022	10.0.0 ~ 10.0.20348.288	`cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.288:::::::*`
Microsoft	Windows Server version 2004	10.0.0 ~ 10.0.19041.1288	`cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1288:::::::*`
Microsoft	Windows Server version 20H2	10.0.0 ~ 10.0.19042.1288	`cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1288:::::::*`
Microsoft	Windows Server 2016	10.0.0 ~ 10.0.14393.4704	`cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4704:::::::*`
Microsoft	Windows Server 2016 (Server Core installation)	10.0.0 ~ 10.0.14393.4704	`cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4704:::::::*`
Microsoft	Windows Server 2008 Service Pack 2	6.0.0 ~ 6.0.6003.21251	`cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21251::::::x64:`
Microsoft	Windows Server 2008 Service Pack 2 (Server Core installation)	6.0.0 ~ 6.0.6003.21251	`cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21251::::::x64:`
Microsoft	Windows Server 2008 Service Pack 2	6.0.0 ~ 6.0.6003.21251	`cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21251::::::x86:`
Microsoft	Windows Server 2008 R2 Service Pack 1	6.1.0 ~ 6.1.7601.25740	`cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25740::::::x64:`
Microsoft	Windows Server 2008 R2 Service Pack 1 (Server Core installation)	6.0.0 ~ 6.1.7601.25740	`cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25740::::::x64:`
Microsoft	Windows Server 2012	6.2.0 ~ 6.2.9200.23490	`cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23490::::::x64:`
Microsoft	Windows Server 2012 (Server Core installation)	6.2.0 ~ 6.2.9200.23490	`cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23490::::::x64:`
Microsoft	Windows Server 2012 R2	6.3.0 ~ 6.3.9600.20144	`cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20144::::::x64:`
Microsoft	Windows Server 2012 R2 (Server Core installation)	6.3.0 ~ 6.3.9600.20144	`cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20144::::::x64:`

II. Public POCs for CVE-2021-40469

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2021-40469

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Vendor Advisories for CVE-2021-40469 (1)

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40469 x_refsource_MISC

https://www.cve.org/CVERecord?id=CVE-2021-40469

Same Patch Batch · Microsoft · 2021-10-13 · 71 CVEs total

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CVE-2021-36970	8.8 HIGH	Windows Print Spooler Spoofing Vulnerability
CVE-2021-41344	8.1 HIGH	Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2021-40487	8.1 HIGH	Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2021-41348	8.0 HIGH	Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2021-40461	8.0 HIGH	Windows Hyper-V Remote Code Execution Vulnerability
CVE-2021-38672	8.0 HIGH	Windows Hyper-V Remote Code Execution Vulnerability
CVE-2021-40464	8.0 HIGH	Windows Nearby Sharing Elevation of Privilege Vulnerability
CVE-2021-40450	7.8 HIGH	Win32k Elevation of Privilege Vulnerability
CVE-2021-40462	7.8 HIGH	Windows Media Foundation Dolby Digital Atmos Decoders Remote Code Execution Vulnerability
CVE-2021-40449	7.8 HIGH	Win32k Elevation of Privilege Vulnerability
CVE-2021-40473	7.8 HIGH	Microsoft Excel Remote Code Execution Vulnerability
CVE-2021-40474	7.8 HIGH	Microsoft Excel Remote Code Execution Vulnerability
CVE-2021-40477	7.8 HIGH	Windows Event Tracing Elevation of Privilege Vulnerability
CVE-2021-40478	7.8 HIGH	Storage Spaces Controller Elevation of Privilege Vulnerability
CVE-2021-40480	7.8 HIGH	Microsoft Office Visio Remote Code Execution Vulnerability
CVE-2021-40485	7.8 HIGH	Microsoft Excel Remote Code Execution Vulnerability
CVE-2021-40486	7.8 HIGH	Microsoft Word Remote Code Execution Vulnerability
CVE-2021-40479	7.8 HIGH	Microsoft Excel Remote Code Execution Vulnerability
CVE-2021-40467	7.8 HIGH	Windows Common Log File System Driver Elevation of Privilege Vulnerability

Showing top 20 of 71 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Windows Server 2019

Same vendor: Microsoft

V. Comments for CVE-2021-40469

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

CVE-2021-40469— Windows DNS Server Remote Code Execution Vulnerability

Quick assessment

Possible ATT&CK Techniques 1 AI

I. Basic Information for CVE-2021-40469

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-2021-40469

III. Intelligence Information for CVE-2021-40469

Vendor Advisories for CVE-2021-40469 (1)

Same Patch Batch · Microsoft · 2021-10-13 · 71 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2021-40469

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