{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2020-11637",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2020-11637",
    "idYear": 2020,
    "status": "PUBLISHED",
    "publishedAt": "2020-10-15T15:08:14.438Z",
    "updatedAt": "2024-09-16T16:33:01.394Z",
    "importedAt": "2026-10-24T01:56:12.831Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Automation Runtime TFTP Service DoS Vulnerability",
      "summary": "A memory leak in the TFTP service in B&R Automation Runtime versions <N4.26, <N4.34, <F4.45, <E4.53, <D4.63, <A4.73 and prior could allow an unauthenticated attacker with network access to cause a denial of service (DoS) condition.",
      "affected": [
        {
          "vendor": "B&R",
          "product": "Automation Runtime",
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThanOrEqual": "4.1x"
            },
            {
              "version": "4.2x",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "N4.26"
            },
            {
              "version": "4.3x",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "N4.34"
            },
            {
              "version": "4.4x",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "F4.45"
            },
            {
              "version": "4.5x",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "E4.53"
            },
            {
              "version": "4.6x",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "D4.63"
            },
            {
              "version": "4.7x",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "A4.73"
            }
          ]
        }
      ]
    }
  }
}