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CVE-2022-34747

Estado: ModificadaCrítica (9.8)—

A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could allow an attacker to achieve unauthorized remote code execution via a crafted UDP packet.

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)

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2022-34747",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@zyxel.com.tw",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
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      },
      {
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          "userInteraction": "NONE",
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          "availabilityImpact": "HIGH",
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          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
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      }
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  },
  "affected": [
    {
      "source": "security@zyxel.com.tw",
      "affectedData": [
        {
          "vendor": "Zyxel",
          "product": "Zyxel NAS326 firmware",
          "versions": [
            {
              "status": "affected",
              "version": "< V5.21(AAZF.12)C0"
            }
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        }
      ]
    }
  ],
  "published": "2022-09-06T02:15:07.517",
  "references": [
    {
      "url": "https://www.zyxel.com/support/Zyxel-security-advisory-for-format-string-vulnerability-in-NAS.shtml",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "security@zyxel.com.tw"
    },
    {
      "url": "https://www.zyxel.com/support/Zyxel-security-advisory-for-format-string-vulnerability-in-NAS.shtml",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@zyxel.com.tw",
      "description": [
        {
          "lang": "en",
          "value": "CWE-134"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-134"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could allow an attacker to achieve unauthorized remote code execution via a crafted UDP packet."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de cadena de formato en Zyxel NAS326 versiones de firmware anteriores a V5.21(AAZF.12)C0, podría permitir a un atacante lograr una ejecución remota no autorizada de código por medio de un paquete UDP diseñado.\n"
    }
  ],
  "lastModified": "2026-06-17T04:50:51.437",
  "configurations": [
    {
      "nodes": [
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  "sourceIdentifier": "security@zyxel.com.tw"
}