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CVE-2021-4039

Estado: ModificadaCrítica (9.8)—💥 Exploit

A command injection vulnerability in the web interface of the Zyxel NWA-1100-NH firmware could allow an attacker to execute arbitrary OS commands on the 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).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

Tecnologías afectadas (1)

Zyxel — Nwa1100-nh Firmware

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-4039",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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    "cvssMetricV31": [
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  "affected": [
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  "published": "2022-03-01T07:15:08.223",
  "references": [
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    },
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      "url": "https://www.zyxel.com/support/OS-command-injection-vulnerability-of-NWA1100-NH-access-point.shtml",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "security@zyxel.com.tw",
      "description": [
        {
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          "value": "CWE-78"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A command injection vulnerability in the web interface of the Zyxel NWA-1100-NH firmware could allow an attacker to execute arbitrary OS commands on the device."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de inyección de comandos en la interfaz web del firmware Zyxel NWA-1100-NH podría permitir a un atacante ejecutar comandos arbitrarios del Sistema Operativo en el dispositivo."
    }
  ],
  "lastModified": "2026-06-17T04:18:56.247",
  "configurations": [
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}