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CVE-2020-11637

Estado: ModificadaAlta (7.5)—

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.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Br-automation — Automation Runtime

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2020-11637",
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        "source": "nvd@nist.gov",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "cybersecurity@ch.abb.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.8,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
          "integrityImpact": "NONE",
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          "product": "Automation Runtime",
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            {
              "status": "affected",
              "version": "4.6x",
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              "status": "affected",
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  ],
  "published": "2020-10-15T16:15:11.773",
  "references": [
    {
      "url": "https://www.br-automation.com/downloads_br_productcatalogue/assets/1595163815396-de-original-1.0.pdf",
      "tags": [
        "Vendor Advisory"
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      "source": "cybersecurity@ch.abb.com"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "cybersecurity@ch.abb.com",
      "description": [
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          "lang": "en",
          "value": "CWE-401"
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    },
    {
      "lang": "es",
      "value": "Una pérdida de memoria en el servicio TFTP en B&amp;R Automation Runtime en versiones anteriores a N4.26, anteriores a N4.34, anteriores a F4.45, anteriores a E4.53, anteriores a D4.63, anteriores a A4.73 y anteriores, podría permitir a un atacante no autenticado con acceso de red causar una condición de denegación de servicio (DoS)"
    }
  ],
  "lastModified": "2026-06-17T02:50:31.823",
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