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CVE-2021-31756

Estado: ModificadaCrítica (9.8)—

An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /gofrom/setwanType allows attackers to execute arbitrary code on the system via a crafted post request. This occurs when input vector controlled by malicious attack get copied to the stack variable.

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)

Tenda — Ac11 Firmware

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-31756",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 10,
          "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"
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        "acInsufInfo": false,
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          "integrityImpact": "HIGH",
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  "affected": [
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      "affectedData": [
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  "published": "2021-05-07T23:15:07.077",
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    {
      "url": "https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_1",
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        "Third Party Advisory"
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  "vulnStatus": "Modified",
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      "description": [
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          "lang": "en",
          "value": "CWE-787"
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  "descriptions": [
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      "value": "An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /gofrom/setwanType allows attackers to execute arbitrary code on the system via a crafted post request. This occurs when input vector controlled by malicious attack get copied to the stack variable."
    },
    {
      "lang": "es",
      "value": "Se detectó un problema en los dispositivos Tenda AC11 con firmware hasta la versión 02.03.01.104_CN. Una vulnerabilidad de desbordamiento del búfer de la pila en /gofrom/setwanType permite a los atacantes ejecutar código arbitrario en el sistema a través de una solicitud de entrada manipulada. Esto ocurre cuando el vector de entrada controlado por el ataque malicioso se copia en la variable de pila"
    }
  ],
  "lastModified": "2026-06-17T03:52:12.320",
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