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CVE-2020-36963

Estado: AplazadaAlta (8.7)—

Intelbras Router RF 301K firmware version 1.1.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to download router configuration files. Attackers can send a specific HTTP GET request to /cgi-bin/DownloadCfg/RouterCfm.cfg to retrieve sensitive router configuration without authentication.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Acceso de red sin autenticación (AV:N/PR:N/UI:N) a endpoint expuesto (/cgi-bin/DownloadCfg). Descarga de archivos de configuración revela credenciales y datos sensibles del router (CWE-306: authentication bypass).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2020-36963",
  "cveTags": [],
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2020-36963",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-01-28T18:59:41.650842Z"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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          "exploitMaturity": "NOT_DEFINED",
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          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
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          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
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      "affectedData": [
        {
          "vendor": "Intelbras",
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          "versions": [
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              "status": "affected",
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            }
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  "published": "2026-01-28T18:16:46.453",
  "references": [
    {
      "url": "https://www.exploit-db.com/exploits/49126",
      "source": "disclosure@vulncheck.com"
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    {
      "url": "https://www.intelbras.com/pt-br/",
      "source": "disclosure@vulncheck.com"
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    {
      "url": "https://www.vulncheck.com/advisories/intelbras-router-rf-k-authentication-bypass",
      "source": "disclosure@vulncheck.com"
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      "description": [
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          "value": "CWE-306"
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      "lang": "en",
      "value": "Intelbras Router RF 301K firmware version 1.1.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to download router configuration files. Attackers can send a specific HTTP GET request to /cgi-bin/DownloadCfg/RouterCfm.cfg to retrieve sensitive router configuration without authentication."
    },
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      "lang": "es",
      "value": "La versión de firmware 1.1.2 del Intelbras Router RF 301K contiene una vulnerabilidad de omisión de autenticación que permite a atacantes no autenticados descargar archivos de configuración del router. Los atacantes pueden enviar una solicitud HTTP GET específica a /cgi-bin/DownloadCfg/RouterCfm.cfg para recuperar la configuración sensible del router sin autenticación."
    }
  ],
  "lastModified": "2026-06-17T03:16:37.627",
  "sourceIdentifier": "disclosure@vulncheck.com"
}