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CVE-2026-35717

Estado: ModificadaMedia (6.3)—

A stack-based buffer overflow in the export_language.cgi binary in VIVOTEK FD8136 firmware FD8136-VVTK-0300a allows authenticated remote attackers to execute arbitrary code as root via a crafted POST request to the /cgi-bin/admin/export_language.cgi endpoint. The handler passes the attacker-controlled Content-Length value directly to fread() as the read size into a fixed-size 0x60-byte stack buffer, overwriting the saved link register. The binary is compiled without stack canaries.

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)

Vivotek — Fd8136 Firmware

CWE

Referencias

JSON original (NVD)

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          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
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              "automatable": "no"
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              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-06-03T13:42:53.968052Z"
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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          "confidentialityImpact": "LOW"
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  "affected": [
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      "affectedData": [
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  "published": "2026-06-02T14:16:51.123",
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      "url": "https://github.com/xchg-rax-rax/vulnerability-research/tree/main/CVE-2026-35717",
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      "value": "A stack-based buffer overflow in the export_language.cgi binary in VIVOTEK FD8136 firmware FD8136-VVTK-0300a allows authenticated remote attackers to execute arbitrary code as root via a crafted POST request to the /cgi-bin/admin/export_language.cgi endpoint. The handler passes the attacker-controlled Content-Length value directly to fread() as the read size into a fixed-size 0x60-byte stack buffer, overwriting the saved link register. The binary is compiled without stack canaries."
    },
    {
      "lang": "es",
      "value": "Un desbordamiento de búfer basado en pila en el binario export_language.cgi en el firmware VIVOTEK FD8136 FD8136-VVTK-0300a permite a atacantes remotos autenticados ejecutar código arbitrario como root a través de una solicitud POST manipulada al endpoint /cgi-bin/admin/export_language.cgi. El gestor pasa el valor Content-Length controlado por el atacante directamente a fread() como el tamaño de lectura en un búfer de pila de tamaño fijo de 0x60 bytes, sobrescribiendo el registro de enlace guardado. El binario se compila sin canarios de pila."
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  ],
  "lastModified": "2026-07-22T19:10:00.120",
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