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CVE-2020-16921— Windows Text Services Framework 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 Windows是美国微软（Microsoft）公司的一种桌面操作系统。 Windows 文本服务框架存在安全漏洞。该漏洞允许攻击者可能会读取非有意泄漏的数据。以下产品及版本受到影响： Windows 10 1909版本， Windows 10 1709版本， Windows Server 1909版本， Windows Server 1903版本， Windows Server 2004版本， Windows 10 2004版本， Windows 10 1809版本， Windows

CVSS 5.5 · Medium EPSS 1.25% · P68 Updated Feb 24, 2026

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

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I. Basic Information for CVE-2020-16921

Vulnerability Information

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Vulnerability Title

Windows Text Services Framework Information Disclosure Vulnerability

Source: CVE Program / CVE List V5

Vulnerability Description

An information disclosure vulnerability exists in Text Services Framework when it fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could potentially read data that was not intended to be disclosed. Note that this vulnerability would not allow an attacker to execute code or to elevate their user rights directly, but it could be used to obtain information that could be used to try to further compromise the affected system. To exploit this vulnerability, an attacker would have to log on to an affected system and open a specially crafted file. The update addresses the vulnerability by correcting how Text Services Framework handles objects in memory.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:L/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 文本服务框架缓冲区错误漏洞

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 ~ publication	`cpe:2.3:o:microsoft:windows_10_1809:::::::x64:*`
Microsoft	Windows 10 Version 1809	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_10_1809:::::::x86:*`
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 10 Version 1909	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_10_1909:::::::x86:*`
Microsoft	Windows Server, version 1909 (Server Core installation)	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_1909::::::::`
Microsoft	Windows 10 Version 1709 for 32-bit Systems	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_10:1709:::::::*`
Microsoft	Windows 10 Version 1709	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_10:1709:::::::*`
Microsoft	Windows 10 Version 1903 for 32-bit Systems	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_10:1903:::::::*`
Microsoft	Windows 10 Version 1903 for x64-based Systems	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_10:1903:::::::*`
Microsoft	Windows 10 Version 1903 for ARM64-based Systems	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_10:1903:::::::*`
Microsoft	Windows Server, version 1903 (Server Core installation)	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_1903::::::::`
Microsoft	Windows 10 Version 2004	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_10_1809:::::::x64:*`
Microsoft	Windows Server version 2004	10.0.0 ~ publication	`cpe:2.3:o:microsoft:windows_server_2004::::::::`

II. Public POCs for CVE-2020-16921

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2020-16921

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Vendor Advisories for CVE-2020-16921 (1)

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16921 x_refsource_MISC

https://www.cve.org/CVERecord?id=CVE-2020-16921

Same Patch Batch · Microsoft · 2020-10-16 · 89 CVEs total

CVE-2020-1080	8.8 HIGH	Windows Hyper-V Elevation of Privilege Vulnerability
CVE-2020-16898	8.8 HIGH	Windows TCP/IP Remote Code Execution Vulnerability
CVE-2020-16911	8.8 HIGH	GDI+ Remote Code Execution Vulnerability
CVE-2020-16891	8.8 HIGH	Windows Hyper-V Remote Code Execution Vulnerability
CVE-2020-16946	8.7 HIGH	Microsoft Office SharePoint XSS Vulnerability
CVE-2020-16945	8.7 HIGH	Microsoft Office SharePoint XSS Vulnerability
CVE-2020-16944	8.7 HIGH	Microsoft SharePoint Reflective XSS Vulnerability
CVE-2020-16952	8.6 HIGH	Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2020-16951	8.6 HIGH	Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2020-16935	7.8 HIGH	Windows COM Server Elevation of Privilege Vulnerability
CVE-2020-16954	7.8 HIGH	Microsoft Office Remote Code Execution Vulnerability
CVE-2020-16940	7.8 HIGH	Windows - User Profile Service Elevation of Privilege Vulnerability
CVE-2020-16939	7.8 HIGH	Group Policy Elevation of Privilege Vulnerability
CVE-2020-16936	7.8 HIGH	Windows Backup Service Elevation of Privilege Vulnerability
CVE-2020-16930	7.8 HIGH	Microsoft Excel Remote Code Execution Vulnerability
CVE-2020-16929	7.8 HIGH	Microsoft Excel Remote Code Execution Vulnerability
CVE-2020-16928	7.8 HIGH	Microsoft Office Click-to-Run Elevation of Privilege Vulnerability
CVE-2020-16924	7.8 HIGH	Jet Database Engine Remote Code Execution Vulnerability
CVE-2020-16931	7.8 HIGH	Microsoft Excel Remote Code Execution Vulnerability
CVE-2020-16967	7.8 HIGH	Windows Camera Codec Pack Remote Code Execution Vulnerability

Showing top 20 of 89 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Windows 10 Version 1803

Same vendor: Microsoft

V. Comments for CVE-2020-16921

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

CVE-2020-16921— Windows Text Services Framework Information Disclosure Vulnerability

Quick assessment

Possible ATT&CK Techniques 1 AI

I. Basic Information for CVE-2020-16921

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-2020-16921

III. Intelligence Information for CVE-2020-16921

Vendor Advisories for CVE-2020-16921 (1)

Same Patch Batch · Microsoft · 2020-10-16 · 89 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2020-16921

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