{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2020-16921", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2020-16921", "idYear": 2020, "status": "PUBLISHED", "publishedAt": "2020-10-16T22:17:49.000Z", "updatedAt": "2024-11-15T16:59:28.604Z", "importedAt": "2026-10-24T01:56:17.081Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "Windows Text Services Framework Information Disclosure Vulnerability", "summary": "

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.

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To exploit this vulnerability, an attacker would have to log on to an affected system and open a specially crafted file.

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The update addresses the vulnerability by correcting how Text Services Framework handles objects in memory.

", "affected": [ { "vendor": "Microsoft", "product": "Windows 10 Version 1803", "platforms": [ "32-bit Systems", "x64-based Systems", "ARM64-based Systems" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows 10 Version 1809", "platforms": [ "32-bit Systems", "x64-based Systems", "ARM64-based Systems" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2019", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2019 (Server Core installation)", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows 10 Version 1909", "platforms": [ "32-bit Systems", "x64-based Systems", "ARM64-based Systems" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows Server, version 1909 (Server Core installation)", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows 10 Version 1709 for 32-bit Systems", "platforms": [ "32-bit Systems" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows 10 Version 1709", "platforms": [ "x64-based Systems", "ARM64-based Systems" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows 10 Version 1903 for 32-bit Systems", "platforms": [ "Unknown" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows 10 Version 1903 for x64-based Systems", "platforms": [ "Unknown" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows 10 Version 1903 for ARM64-based Systems", "platforms": [ "Unknown" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows Server, version 1903 (Server Core installation)", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows 10 Version 2004", "platforms": [ "32-bit Systems", "ARM64-based Systems", "x64-based Systems" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] }, { "vendor": "Microsoft", "product": "Windows Server version 2004", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "10.0.0", "status": "affected", "versionType": "custom", "lessThan": "publication" } ] } ] } } }