{
  "id": "CVE-2020-0646",
  "url": "https://spydr.io/cve/CVE-2020-0646",
  "published": "2020-01-14T23:15:33.143Z",
  "modified": "2026-06-17T02:46:15.230Z",
  "score": 9.8,
  "severity": "critical",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "score_source": "NVD",
  "epss": 0.99222,
  "epss_percentile": 0.99935,
  "exploited": true,
  "kev": {
    "added": "2021-11-03",
    "due": "2022-05-03",
    "action": "Apply updates per vendor instructions.",
    "ransomware": "Unknown",
    "name": "Microsoft .NET Framework Remote Code Execution Vulnerability",
    "notes": "https://nvd.nist.gov/vuln/detail/CVE-2020-0646"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "Microsoft"
  ],
  "products": [
    "Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2",
    "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2",
    "Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems",
    "Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems",
    "Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation)",
    "Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems",
    "Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems",
    "Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems",
    "Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems",
    "Microsoft .NET Framework 4.8 on Windows Server 2016",
    "Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation)",
    "Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1",
    "Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1",
    "Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems",
    "Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems",
    "Microsoft .NET Framework 4.8 on Windows RT 8.1",
    "Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1",
    "Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)",
    "Microsoft .NET Framework 4.8 on Windows Server 2012",
    "Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation)"
  ],
  "cwes": [
    "CWE-91"
  ],
  "description": "A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 9.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "http://packetstormsecurity.com/files/156930/SharePoint-Workflows-XOML-Injection.html",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ]
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0646",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2020-0646",
  "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."
    }
  ]
}