CVE-2026-54208

Estado: AplazadaAlta (8.5)—

Tobit Laboratories AG TeamDavid's Webbox application is vulnerable to arbitrary file write, allowing an unauthenticated attacker to create or write into existing files on the server with attacker-controlled content. This is possible because user input is written directly to files without proper validation or restriction on file types. As a result, an attacker can create files (e.g., .htm), containing malicious JavaScript code. When a user accesses a file created in this way, stored cross-site scripting is triggered. This issue affects TeamDavid before Rollout 528.

Starting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L/E:X/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: 8.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.52%
Percentil entre todas las CVEs puntuadas: 42
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.

ExplotaciónT1189 Drive-by Compromiseinitial access85 %
Impacto principalT1505.003 Web Shellpersistence90 %

Vector AV:N/UI:P indica interacción del usuario, pero el atacante crea archivos .htm con JavaScript malicioso en el servidor (arbitrary file write → web shell). Cuando el usuario accede, se dispara XSS almacenado (stored XSS = T1189 en el cliente). La explotación inicial es T1189 (drive-by via file

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

User Training User Account Management Restrict Web-Based Content Disable or Remove Feature or Program Application Isolation and Sandboxing Exploit Protection

Tecnologías afectadas (1)

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

Tobit Laboratories AG — Teamdavid Webbox^AI

CWE

CWE-20, CWE-284

Referencias

JSON original (NVD)

Mostrar

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          "role": "CISA Coordinator",
          "options": [
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          "version": "2.0.3",
          "timestamp": "2026-08-07T14:41:23.183708Z"
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          "modules": [
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  "published": "2026-08-07T10:16:57.740",
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      "source": "vulnerability@ncsc.ch"
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      "url": "https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/",
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      "value": "Tobit Laboratories AG TeamDavid's Webbox application is vulnerable to arbitrary file write, allowing an \nunauthenticated attacker to create or write into existing files on the \nserver with attacker-controlled content. This is possible because user \ninput is written directly to files without proper validation or \nrestriction on file types. As a result, an attacker can create files \n(e.g., .htm), containing malicious JavaScript code. When a user accesses\n a file created in this way, stored cross-site scripting is triggered. This issue affects TeamDavid before Rollout 528.\n\nStarting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality."
    }
  ],
  "lastModified": "2026-09-07T13:20:28.347",
  "sourceIdentifier": "vulnerability@ncsc.ch"
}