{
  "id": "CVE-2024-21338",
  "url": "https://spydr.io/cve/CVE-2024-21338",
  "published": "2024-02-13T18:15:49.083Z",
  "modified": "2026-08-10T16:18:40.377Z",
  "score": 7.8,
  "severity": "high",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "score_source": "microsoft.com",
  "epss": 0.5981,
  "epss_percentile": 0.9911,
  "exploited": true,
  "kev": {
    "added": "2024-03-04",
    "due": "2024-03-25",
    "action": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
    "ransomware": "Known",
    "name": "Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerability",
    "notes": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338; https://nvd.nist.gov/vuln/detail/CVE-2024-21338"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "Microsoft"
  ],
  "products": [
    "Microsoft Windows 10 Version 1809",
    "Microsoft Windows 10 Version 21H2",
    "Microsoft Windows 10 Version 22H2",
    "Microsoft Windows 11 version 21H2",
    "Microsoft Windows 11 version 22H2",
    "Microsoft Windows 11 version 22H3",
    "Microsoft Windows 11 Version 23H2",
    "Microsoft Windows Server 2019",
    "Microsoft Windows Server 2019 (Server Core installation)",
    "Microsoft Windows Server 2022",
    "Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)"
  ],
  "cwes": [
    "CWE-822"
  ],
  "description": "Windows Kernel Elevation of Privilege Vulnerability",
  "status": "Analyzed",
  "score_type": "Secondary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 7.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://decoded.avast.io/janvojtesek/lazarus-and-the-fudmodule-rootkit-beyond-byovd-with-an-admin-to-kernel-zero-day/",
      "tags": [
        "Exploit",
        "Technical Description",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://packetstorm.news/files/id/190586/",
      "tags": [
        "Exploit",
        "VDB Entry"
      ]
    },
    {
      "url": "https://www.exploit-db.com/exploits/52275",
      "tags": [
        "Exploit",
        "VDB Entry"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21338",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2024-21338",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}