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CVE-2026-14818

Estado: Pendiente de análisisAlta (7.2)—

A path traversal vulnerability in the CLI command used to execute configuration files in Zyxel ATP series firmware versions from V4.32 through V5.42 Patch 1, USG FLEX series firmware versions from V4.50 through V5.42 Patch 1, USG FLEX 50(W) series firmware versions from V4.16 through V5.42 Patch 1, and USG20(W)-VPN series firmware versions from V4.16 through V5.42 Patch 1 could allow an authenticated attacker with administrator privileges to execute a crafted malicious configuration file on an affected device.

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.

AV:N con PR:H (privilegios de administrador necesarios) y ejecución remota de archivo de configuración malicioso en dispositivo Zyxel. Path traversal (CWE-22) permite lectura/ejecución de datos arbitrarios.

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

Privileged Account ManagementDisable or Remove Feature or ProgramVulnerability ScanningThreat Intelligence ProgramRestrict Web-Based ContentNetwork Segmentation

Tecnologías afectadas (4)

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

Zyxel — ATP Series FirmwareAIZyxel — Usg20 VPN Series FirmwareAIZyxel — USG Flex 50 Series FirmwareAIZyxel — USG Flex Series FirmwareAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-14818",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-14818",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-04T18:45:12.941861Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@zyxel.com.tw",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.2,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.2
      }
    ]
  },
  "affected": [
    {
      "source": "security@zyxel.com.tw",
      "affectedData": [
        {
          "vendor": "Zyxel",
          "product": "ATP series firmware",
          "versions": [
            {
              "status": "affected",
              "version": "from V4.32 through V5.42 Patch 1"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Zyxel",
          "product": "USG FLEX series firmware",
          "versions": [
            {
              "status": "affected",
              "version": "from V4.50 through V5.42 Patch 1"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Zyxel",
          "product": "USG FLEX 50(W) series firmware",
          "versions": [
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              "version": "from V4.16 through V5.42 Patch 1"
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          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Zyxel",
          "product": "USG20(W)-VPN series firmware",
          "versions": [
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          "defaultStatus": "unaffected"
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  ],
  "published": "2026-08-04T04:16:30.930",
  "references": [
    {
      "url": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-path-traversal-vulnerability-in-the-configuration-file-execution-cli-command-of-zld-firewalls-08-04-2026",
      "source": "security@zyxel.com.tw"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@zyxel.com.tw",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A path traversal vulnerability in the CLI command used to execute configuration files in Zyxel ATP series firmware versions from V4.32 through V5.42 Patch 1, USG FLEX series firmware versions from V4.50 through V5.42 Patch 1, USG FLEX 50(W) series firmware versions from V4.16 through V5.42 Patch 1, and USG20(W)-VPN series firmware versions from V4.16 through V5.42 Patch 1 could allow an authenticated attacker with administrator privileges to execute a crafted malicious configuration file on an affected device."
    }
  ],
  "lastModified": "2026-08-04T19:16:42.413",
  "sourceIdentifier": "security@zyxel.com.tw"
}