{
  "id": "CVE-2019-1064",
  "url": "https://spydr.io/cve/CVE-2019-1064",
  "published": "2019-06-12T14:29:04.273Z",
  "modified": "2026-06-17T02:27:44.930Z",
  "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": "NVD",
  "epss": 0.06886,
  "epss_percentile": 0.93902,
  "exploited": true,
  "kev": {
    "added": "2022-03-15",
    "due": "2022-04-05",
    "action": "Apply updates per vendor instructions.",
    "ransomware": "Known",
    "name": "Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability",
    "notes": "https://nvd.nist.gov/vuln/detail/CVE-2019-1064"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "Microsoft"
  ],
  "products": [
    "Microsoft Windows 10 Version 1703",
    "Microsoft Windows 10 Version 1803",
    "Microsoft Windows Server, version 1803 (Server Core Installation)",
    "Microsoft Windows 10 Version 1809",
    "Microsoft Windows Server 2019",
    "Microsoft Windows Server 2019 (Server Core installation)",
    "Microsoft Windows 10 Version 1709 for 32-bit Systems",
    "Microsoft Windows 10 Version 1709",
    "Microsoft Windows 10 Version 1903 for 32-bit Systems",
    "Microsoft Windows 10 Version 1903 for x64-based Systems",
    "Microsoft Windows 10 Version 1903 for ARM64-based Systems",
    "Microsoft Windows Server, version 1903 (Server Core installation)",
    "Microsoft Windows 10 Version 1607",
    "Microsoft Windows Server 2016",
    "Microsoft Windows Server 2016 (Server Core installation)"
  ],
  "cwes": [
    "CWE-59"
  ],
  "description": "An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The security update addresses the vulnerability by correcting how Windows AppX Deployment Service handles hard links.",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 7.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1064",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1064",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-1064",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2019-1064",
  "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."
    }
  ]
}