{
  "cveId": "CVE-2021-42279",
  "url": "https://patchblox.com/security/cve/CVE-2021-42279",
  "summary": "CVE-2021-42279 is fixed in 25 products on 1 platform, first by KB5007192, released November 9, 2021. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "Chakra Scripting Engine Memory Corruption Vulnerability",
  "description": "",
  "published": "2021-11-09T14:00:00Z",
  "severity": "Critical",
  "cvss": 4.2,
  "epss": 0.02319,
  "epssPercentile": 0.83548,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42279",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for 32-bit Systems",
      "fixedVersion": "14393.4770",
      "fix": "KB5007192",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007192",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for x64-based Systems",
      "fixedVersion": "14393.4770",
      "fix": "KB5007192",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007192",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for 32-bit Systems",
      "fixedVersion": "17763.2300",
      "fix": "KB5007206",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007206",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for ARM64-based Systems",
      "fixedVersion": "17763.2300",
      "fix": "KB5007206",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007206",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "fixedVersion": "17763.2300",
      "fix": "KB5007206",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007206",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for 32-bit Systems",
      "fixedVersion": "18363.1916",
      "fix": "KB5007189",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007189",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for ARM64-based Systems",
      "fixedVersion": "18363.1916",
      "fix": "KB5007189",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007189",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for x64-based Systems",
      "fixedVersion": "18363.1916",
      "fix": "KB5007189",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007189",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 2004 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5007186",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007186",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 2004 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5007186",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007186",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 2004 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5007186",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007186",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 20H2 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5007186",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007186",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 20H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5007186",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007186",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H1 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5007186",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007186",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H1 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5007186",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007186",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H1 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5007186",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007186",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for 32-bit Systems",
      "fixedVersion": "10240.19119",
      "fix": "KB5007207",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007207",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for x64-based Systems",
      "fixedVersion": "10240.19119",
      "fix": "KB5007207",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007207",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 version 21H2 for ARM64-based Systems",
      "fixedVersion": "22000.318",
      "fix": "KB5007215",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007215",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 version 21H2 for x64-based Systems",
      "fixedVersion": "22000.318",
      "fix": "KB5007215",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007215",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.4770",
      "fix": "KB5007192",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007192",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.2300",
      "fix": "KB5007206",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007206",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022",
      "fixedVersion": "20348.350",
      "fix": "KB5007205",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007205",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 2004 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5007186",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007186",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 20H2 (Server Core Installation)",
      "fixedVersion": "",
      "fix": "KB5007186",
      "url": "https://patchblox.com/security/fix/microsoft/kb5007186",
      "released": "2021-11-09T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}