{
  "cveId": "CVE-2020-16921",
  "url": "https://patchblox.com/security/cve/CVE-2020-16921",
  "summary": "CVE-2020-16921 is fixed in 23 products on 1 platform, first by KB4580328, released October 13, 2020. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Windows Text Services Framework Information Disclosure Vulnerability",
  "description": "\u003Cp\u003EAn 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.\u003C/p\u003E\n\u003Cp\u003ETo exploit this vulnerability, an attacker would have to log on to an affected system and open a specially crafted file.\u003C/p\u003E\n\u003Cp\u003EThe update addresses the vulnerability by correcting how Text Services Framework handles objects in memory.\u003C/p\u003E",
  "published": "2020-10-13T07:00:00Z",
  "severity": "Important",
  "cvss": 5.5,
  "epss": 0.01253,
  "epssPercentile": 0.69652,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-16921",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for 32-bit Systems",
      "fixedVersion": "16299.2166",
      "fix": "KB4580328",
      "url": "https://patchblox.com/security/fix/microsoft/kb4580328",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for ARM64-based Systems",
      "fixedVersion": "16299.2166",
      "fix": "KB4580328",
      "url": "https://patchblox.com/security/fix/microsoft/kb4580328",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for x64-based Systems",
      "fixedVersion": "16299.2166",
      "fix": "KB4580328",
      "url": "https://patchblox.com/security/fix/microsoft/kb4580328",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for 32-bit Systems",
      "fixedVersion": "17134.1792",
      "fix": "KB4580330",
      "url": "https://patchblox.com/security/fix/microsoft/kb4580330",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for ARM64-based Systems",
      "fixedVersion": "17134.1792",
      "fix": "KB4580330",
      "url": "https://patchblox.com/security/fix/microsoft/kb4580330",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for x64-based Systems",
      "fixedVersion": "17134.1792",
      "fix": "KB4580330",
      "url": "https://patchblox.com/security/fix/microsoft/kb4580330",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for 32-bit Systems",
      "fixedVersion": "17763.1518",
      "fix": "KB4577668",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577668",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for ARM64-based Systems",
      "fixedVersion": "17763.1518",
      "fix": "KB4577668",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577668",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "fixedVersion": "17763.1518",
      "fix": "KB4577668",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577668",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB4577671",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577671",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB4577671",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577671",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB4577671",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577671",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB4577671",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577671",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB4577671",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577671",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB4577671",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577671",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 2004 for 32-bit Systems",
      "fixedVersion": "19041.572",
      "fix": "KB4579311",
      "url": "https://patchblox.com/security/fix/microsoft/kb4579311",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 2004 for ARM64-based Systems",
      "fixedVersion": "19041.572",
      "fix": "KB4579311",
      "url": "https://patchblox.com/security/fix/microsoft/kb4579311",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 2004 for x64-based Systems",
      "fixedVersion": "19041.572",
      "fix": "KB4579311",
      "url": "https://patchblox.com/security/fix/microsoft/kb4579311",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.1518",
      "fix": "KB4577668",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577668",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.1518",
      "fix": "KB4577668",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577668",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1903 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4577671",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577671",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1909 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB4577671",
      "url": "https://patchblox.com/security/fix/microsoft/kb4577671",
      "released": "2020-10-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 2004 (Server Core installation)",
      "fixedVersion": "19041.572",
      "fix": "KB4579311",
      "url": "https://patchblox.com/security/fix/microsoft/kb4579311",
      "released": "2020-10-13T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}