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CVE-2020-0856— Active Directory Information Disclosure Vulnerability

Quick assessment

Affected

Microsoft Windows Server 2019

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 Windows是美国微软（Microsoft）公司的一套个人设备使用的操作系统。 Microsoft Windows Active Directory integrated DNS (ADIDNS)存在信息泄露漏洞，该漏洞允许攻击者将特殊设计的请求发送到ADIDNS服务，从而读取目标系统的敏感信息。以下产品及版本受到影响： Windows Server 2008 R2版本， Windows Server 1909版本， Windows Server 1903版本， Windows Se

CVSS 6.5 · Medium EPSS 3.90% · P90 Updated Feb 24, 2026

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

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I. Basic Information for CVE-2020-0856

Vulnerability Information

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Vulnerability Title

Active Directory Information Disclosure Vulnerability

Source: CVE Program / CVE List V5

Vulnerability Description

An information disclosure vulnerability exists when Active Directory integrated DNS (ADIDNS) mishandles objects in memory. An authenticated attacker who successfully exploited this vulnerability would be able to read sensitive information about the target system. To exploit this condition, an authenticated attacker would need to send a specially crafted request to the AD|DNS service. Note that the information disclosure vulnerability by itself would not be sufficient for an attacker to compromise a system. However, an attacker could combine this vulnerability with additional vulnerabilities to further exploit the system. The update addresses the vulnerability by correcting how Active Directory integrated DNS (ADIDNS) handles objects in memory.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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 Windows Active Directory integrated DNS (ADIDNS) 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 Server 2019	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2019::::::::`
Microsoft	Windows Server 2019 (Server Core installation)	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2019::::::::`
Microsoft	Windows Server, version 1909 (Server Core installation)	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_1909::::::::`
Microsoft	Windows Server, version 1903 (Server Core installation)	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_1903::::::::`
Microsoft	Windows Server version 2004	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2004::::::::`
Microsoft	Windows Server 2016	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2016::::::::`
Microsoft	Windows Server 2016 (Server Core installation)	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2016::::::::`
Microsoft	Windows Server 2008 Service Pack 2	6.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2008_sp2:::::::x64:*`
Microsoft	Windows Server 2008 Service Pack 2 (Server Core installation)	6.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2008_sp2:::::::x64:*`
Microsoft	Windows Server 2008 Service Pack 2	6.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2008_sp2:::::::x86:*`
Microsoft	Windows Server 2008 R2 Service Pack 1	6.1.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2008_R2:::::::x64:*`
Microsoft	Windows Server 2008 R2 Service Pack 1 (Server Core installation)	6.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2008_R2:::::::x64:*`
Microsoft	Windows Server 2012	6.2.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2012:::::::x64:*`
Microsoft	Windows Server 2012 (Server Core installation)	6.2.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2012:::::::x64:*`
Microsoft	Windows Server 2012 R2	6.3.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2012_R2:::::::x64:*`
Microsoft	Windows Server 2012 R2 (Server Core installation)	6.3.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2012_R2:::::::x64:*`

II. Public POCs for CVE-2020-0856

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2020-0856

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Vendor Advisories for CVE-2020-0856 (1)

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0856 x_refsource_MISC

https://www.cve.org/CVERecord?id=CVE-2020-0856

Same Patch Batch · Microsoft · 2020-09-11 · 129 CVEs total

CVE-2020-1595	9.9 CRITICAL	Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2020-1210	9.9 CRITICAL	Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2020-1523	8.9 HIGH	Microsoft SharePoint Server Tampering Vulnerability
CVE-2020-0718	8.8 HIGH	Active Directory Remote Code Execution Vulnerability
CVE-2020-0761	8.8 HIGH	Active Directory Remote Code Execution Vulnerability
CVE-2020-1129	8.8 HIGH	Microsoft Windows Codecs Library Remote Code Execution Vulnerability
CVE-2020-1012	8.8 HIGH	WinINet API Elevation of Privilege Vulnerability
CVE-2020-0922	8.8 HIGH	Microsoft COM for Windows Remote Code Execution Vulnerability
CVE-2020-1453	8.6 HIGH	Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2020-1200	8.6 HIGH	Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2020-1452	8.6 HIGH	Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2020-1460	8.6 HIGH	Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2020-1576	8.5 HIGH	Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2020-16875	8.4 HIGH	Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2020-1285	8.4 HIGH	GDI+ Remote Code Execution Vulnerability
CVE-2020-1507	7.9 HIGH	Microsoft COM for Windows Elevation of Privilege Vulnerability
CVE-2020-1039	7.8 HIGH	Jet Database Engine Remote Code Execution Vulnerability
CVE-2020-1074	7.8 HIGH	Jet Database Engine Remote Code Execution Vulnerability
CVE-2020-1115	7.8 HIGH	Windows Common Log File System Driver Elevation of Privilege Vulnerability
CVE-2020-1053	7.8 HIGH	DirectX Elevation of Privilege Vulnerability

Showing top 20 of 129 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Windows Server 2019

Same vendor: Microsoft

V. Comments for CVE-2020-0856

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

CVE-2020-0856— Active Directory Information Disclosure Vulnerability

Quick assessment

Possible ATT&CK Techniques 1 AI

I. Basic Information for CVE-2020-0856

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-2020-0856

III. Intelligence Information for CVE-2020-0856

Vendor Advisories for CVE-2020-0856 (1)

Same Patch Batch · Microsoft · 2020-09-11 · 129 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2020-0856

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