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CVE-2021-47741

Estado: AplazadaAlta (8.7)—

ZBL EPON ONU Broadband Router V100R001 contains a privilege escalation vulnerability that allows limited administrative users to elevate access by sending requests to configuration endpoints. Attackers can exploit the vulnerability by accessing the configuration backup or password page to disclose the super user password and gain additional privileged functionalities.

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.

CVE de escalada en router EPON con acceso remoto (AV:N, PR:L): T1210. Impacto: T1552 (divulgación de credenciales en backup/página de contraseña), T1068 (elevación a superusuario).

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

Update SoftwareThreat Intelligence ProgramPrivileged Account ManagementApplication Isolation and SandboxingExploit ProtectionActive Directory Configuration

Tecnologías afectadas (2)

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

ZBL — Epon ONU Broadband RouterAIZBL — V100r001AI

CWE

Referencias

JSON original (NVD)

Mostrar
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        "ssvcData": {
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          "options": [
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              "automatable": "no"
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          "version": "2.0.3",
          "timestamp": "2026-01-02T20:06:38.476226Z"
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          "integrityImpact": "NONE",
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          "attackComplexity": "LOW",
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          "privilegesRequired": "NONE",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
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  "published": "2025-12-31T19:15:42.300",
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      "url": "http://www.zblchina.com",
      "source": "disclosure@vulncheck.com"
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      "url": "https://web.archive.org/web/20211220094023/http://www.wd-thailand.com/",
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      "url": "https://www.exploit-db.com/exploits/49737",
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      "url": "https://www.vulncheck.com/advisories/zbl-epon-onu-broadband-router-vr-privilege-escalation-via-configuration-endpoint",
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    }
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  "sourceIdentifier": "disclosure@vulncheck.com"
}