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CVE-2021-25909

Status: ModifiedHigh (7.5)—

ZIV Automation 4CCT-EA6-334126BF firmware version 3.23.80.27.36371, allows an unauthenticated, remote attacker to cause a denial of service condition on the device. An attacker could exploit this vulnerability by sending specific packets to the port 7919.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Zivautomation — 4cct-ea6-334126bf Firmware

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-25909",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "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"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "version": "3.1",
          "baseScore": 8.6,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
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          "attackVector": "NETWORK",
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          "vendor": "ZIV AUTOMATION",
          "product": "4CCT-EA6-334126BF",
          "versions": [
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              "version": "3.23.80.27.36371"
            }
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  ],
  "published": "2021-01-29T14:15:12.277",
  "references": [
    {
      "url": "https://www.incibe-cert.es/en/early-warning/ics-advisories/4cct-vulnerable-denial-service-attack",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve-coordination@incibe.es"
    },
    {
      "url": "https://www.incibe-cert.es/en/early-warning/ics-advisories/4cct-vulnerable-denial-service-attack",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "cve-coordination@incibe.es",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
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    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "ZIV Automation 4CCT-EA6-334126BF firmware version 3.23.80.27.36371, allows an unauthenticated, remote attacker to cause a denial of service condition on the device. An attacker could exploit this vulnerability by sending specific packets to the port 7919."
    },
    {
      "lang": "es",
      "value": "ZIV Automation 4CCT-EA6-334126BF, versión de firmware 3.23.80.27.36371, permite a un atacante remoto no autenticado causar una condición de denegación de servicio en el dispositivo. Un atacante podría explotar esta vulnerabilidad mediante el envío de paquetes específicos hacia el puerto 7919"
    }
  ],
  "lastModified": "2026-06-17T03:42:33.763",
  "configurations": [
    {
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  "sourceIdentifier": "cve-coordination@incibe.es"
}