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CVE-2021-20612

Estado: ModificadaAlta (7.5)—

Lack of administrator control over security vulnerability in MELSEC-F series FX3U-ENET Firmware version 1.14 and prior, FX3U-ENET-L Firmware version 1.14 and prior and FX3U-ENET-P502 Firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition in communication function of the product or other unspecified effects by sending specially crafted packets to an unnecessary opening of TCP port. Control by MELSEC-F series PLC is not affected by this vulnerability, but system reset is required for recovery.

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 (3)

Mitsubishielectric — Fx3u-enet-l FirmwareMitsubishielectric — Fx3u-enet-p502 FirmwareMitsubishielectric — Fx3u-enet Firmware

CWE

Referencias

JSON original (NVD)

Mostrar
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
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        "impactScore": 6.9,
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          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
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  "affected": [
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      "affectedData": [
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          "vendor": "n/a",
          "product": "MELSEC-F series FX3U-ENET; MELSEC-F series FX3U-ENET-L; MELSEC-F series FX3U-ENET-P502",
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  "published": "2022-01-14T20:15:09.850",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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      "value": "Lack of administrator control over security vulnerability in MELSEC-F series FX3U-ENET Firmware version 1.14 and prior, FX3U-ENET-L Firmware version 1.14 and prior and FX3U-ENET-P502 Firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition in communication function of the product or other unspecified effects by sending specially crafted packets to an unnecessary opening of TCP port. Control by MELSEC-F series PLC is not affected by this vulnerability, but system reset is required for recovery."
    },
    {
      "lang": "es",
      "value": "Una falta de control del administrador sobre la vulnerabilidad de seguridad en la serie MELSEC-F FX3U-ENET Firmware versión 1.14 y anteriores, FX3U-ENET-L Firmware versión 1.14 y anteriores y FX3U-ENET-P502 Firmware versión 1.14 y anteriores permite que un atacante remoto no autenticado cause una condición de denegación de servicio (DoS) en la función de comunicación del producto u otros efectos no especificados mediante el envío de paquetes especialmente diseñados a una apertura no necesaria del puerto TCP. El control por parte del PLC de la serie MELSEC-F no está afectado por esta vulnerabilidad, pero es necesario reiniciar el sistema para recuperarlo"
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  "lastModified": "2026-06-17T03:34:07.477",
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