{
  "cveId": "CVE-2018-8449",
  "url": "https://patchblox.com/security/cve/CVE-2018-8449",
  "summary": "CVE-2018-8449 is fixed in 14 products on 1 platform, first by KB4457131, released September 11, 2018. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.",
  "title": "Device Guard Security Feature Bypass Vulnerability",
  "description": "\u003Cp\u003EA security feature bypass exists when Device Guard incorrectly validates an untrusted file. An attacker who successfully exploited this vulnerability could make an unsigned file appear to be signed. Because Device Guard relies on the signature to determine the file is non-malicious, Device Guard could then allow a malicious file to execute.\u003C/p\u003E\n\u003Cp\u003EIn an attack scenario, an attacker could make an untrusted file appear to be a trusted file.\u003C/p\u003E\n\u003Cp\u003EThe update addresses the vulnerability by correcting how Device Guard handles untrusted files.\u003C/p\u003E",
  "published": "2018-09-11T07:00:00Z",
  "severity": "Important",
  "cvss": 5.3,
  "epss": 0.03109,
  "epssPercentile": 0.87845,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation More Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8449",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for 32-bit Systems",
      "fixedVersion": "14393.2485",
      "fix": "KB4457131",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457131",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for x64-based Systems",
      "fixedVersion": "14393.2485",
      "fix": "KB4457131",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457131",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "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": "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": "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": "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": "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": "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"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for 32-bit Systems",
      "fixedVersion": "10240.17976",
      "fix": "KB4457132",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457132",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for x64-based Systems",
      "fixedVersion": "10240.17976",
      "fix": "KB4457132",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457132",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.2485",
      "fix": "KB4457131",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457131",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016 (Server Core installation)",
      "fixedVersion": "14393.2485",
      "fix": "KB4457131",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457131",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1709  (Server Core Installation)",
      "fixedVersion": "16299.665",
      "fix": "KB4457142",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457142",
      "released": "2018-09-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1803  (Server Core Installation)",
      "fixedVersion": "17134.285",
      "fix": "KB4457128",
      "url": "https://patchblox.com/security/fix/microsoft/kb4457128",
      "released": "2018-09-11T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T12:40:37Z"
}