{
  "cveId": "CVE-2021-34458",
  "url": "https://patchblox.com/security/cve/CVE-2021-34458",
  "summary": "CVE-2021-34458 is fixed in 6 products on 1 platform, first by KB5004238, released July 13, 2021. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "Windows Kernel Remote Code Execution Vulnerability",
  "description": "",
  "published": "2021-07-13T12:00:00Z",
  "severity": "Critical",
  "cvss": 9.9,
  "epss": 0.02625,
  "epssPercentile": 0.85576,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34458",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.4530",
      "fix": "KB5004238",
      "url": "https://patchblox.com/security/fix/microsoft/kb5004238",
      "released": "2021-07-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016 (Server Core installation)",
      "fixedVersion": "14393.4530",
      "fix": "KB5004238",
      "url": "https://patchblox.com/security/fix/microsoft/kb5004238",
      "released": "2021-07-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.2061",
      "fix": "KB5004244",
      "url": "https://patchblox.com/security/fix/microsoft/kb5004244",
      "released": "2021-07-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.2061",
      "fix": "KB5004244",
      "url": "https://patchblox.com/security/fix/microsoft/kb5004244",
      "released": "2021-07-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 2004 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5004237",
      "url": "https://patchblox.com/security/fix/microsoft/kb5004237",
      "released": "2021-07-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 20H2 (Server Core Installation)",
      "fixedVersion": "",
      "fix": "KB5004237",
      "url": "https://patchblox.com/security/fix/microsoft/kb5004237",
      "released": "2021-07-13T00:00:00Z"
    }
  ],
  "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"
  }
}