{
  "cveId": "CVE-2018-8456",
  "url": "https://patchblox.com/security/cve/CVE-2018-8456",
  "summary": "CVE-2018-8456 is fixed in 6 products on 1 platform, first by KB4457138, released September 11, 2018. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.",
  "title": "Scripting Engine Memory Corruption Vulnerability",
  "description": "\u003Cp\u003EA remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user.\u003C/p\u003E\n\u003Cp\u003EIf the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.\u003C/p\u003E\n\u003Cp\u003EThe security update addresses the vulnerability by modifying how the ChakraCore scripting engine handles objects in memory.\u003C/p\u003E",
  "published": "2018-09-11T07:00:00Z",
  "severity": "Critical",
  "cvss": 4.2,
  "epss": 0.14945,
  "epssPercentile": 0.96728,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation More Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8456",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for 32-bit Systems",
      "fixedVersion": "15063.1324",
      "fix": "KB4457138",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457138",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for x64-based Systems",
      "fixedVersion": "15063.1324",
      "fix": "KB4457138",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457138",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems",
      "fixedVersion": "16299.665",
      "fix": "KB4457142",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457142",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems",
      "fixedVersion": "16299.665",
      "fix": "KB4457142",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457142",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems",
      "fixedVersion": "17134.285",
      "fix": "KB4457128",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457128",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems",
      "fixedVersion": "17134.285",
      "fix": "KB4457128",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457128",
      "released": "2018-09-11T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}