CVE-2026-9397

Estado: AplazadaAlta (8.2)—

A weakness has been identified in Besen BS20 EV Charging Station up to 20260426. Affected by this issue is some unknown functionality of the component OTA Update Installation Handler. This manipulation causes improper authorization. The attack is possible to be carried out remotely. A high degree of complexity is needed for the attack. The exploitation is known to be difficult. The original disclosure mentions, that "[t]hese vulnerabilities have been reported to Besen and we have received their acknowlegement that they are reviewing this as of April 2026."

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 8.2

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.77%
Percentil entre todas las CVEs puntuadas: 54
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access72 %
Impacto principalT1068 Exploitation for Privilege Escalationprivilege escalation65 %

Vector AV:N/PR:N/UI:N indica acceso remoto sin privilegios ni interacción (T1190). CWE-266/285 (improper authorization) en OTA Update Handler sugiere escalada de privilegios como impacto primario (T1068), aunque no se especifica qué comando/dato se accede post-explotación.

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

Application Isolation and Sandboxing Exploit Protection Update Software Vulnerability Scanning Threat Intelligence Program Privileged Account Management

Tecnologías afectadas (1)

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

Besen — Bs20^AI

CWE

CWE-266, CWE-285

Referencias

JSON original (NVD)

Mostrar

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  "id": "CVE-2026-9397",
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          "modules": [
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          "versions": [
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  "published": "2026-05-24T21:16:32.767",
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      "url": "https://github.com/carfeii/besen#finding-4-unauthorized-firmware-installation-via-spoofed-ota-updates",
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          "value": "CWE-266"
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          "value": "CWE-285"
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    {
      "lang": "en",
      "value": "A weakness has been identified in Besen BS20 EV Charging Station up to 20260426. Affected by this issue is some unknown functionality of the component OTA Update Installation Handler. This manipulation causes improper authorization. The attack is possible to be carried out remotely. A high degree of complexity is needed for the attack. The exploitation is known to be difficult. The original disclosure mentions, that \"[t]hese vulnerabilities have been reported to Besen and we have received their acknowlegement that they are reviewing this as of April 2026.\""
    },
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      "lang": "es",
      "value": "Se ha identificado una debilidad en la estación de carga de vehículos eléctricos Besen BS20 hasta el 20260426. Este problema afecta a alguna funcionalidad desconocida del componente Gestor de instalación de actualizaciones OTA. Esta manipulación causa autorización indebida. El ataque puede ser llevado a cabo de forma remota. Se necesita un alto grado de complejidad para el ataque. Se sabe que la explotación es difícil. La divulgación original menciona que 'Estas vulnerabilidades han sido reportadas a Besen y hemos recibido su reconocimiento de que están revisando esto a partir de abril de 2026'."
    }
  ],
  "lastModified": "2026-07-23T11:10:00.120",
  "sourceIdentifier": "cna@vuldb.com"
}