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CVE-2021-39510

Estado: ModificadaCrítica (9.8)—

An issue was discovered in D-Link DIR816_A1_FW101CNB04 750m11ac wireless router, The HTTP request parameter is used in the handler function of /goform/form2userconfig.cgi route, which can construct the user name string to delete the user function. This can lead to command injection through shell metacharacters.

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)

Dlink — Dir-816 Firmware

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-39510",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
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          "scope": "UNCHANGED",
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          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "exploitabilityScore": 3.9
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  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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              "status": "affected",
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  "published": "2021-08-24T19:15:33.010",
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    {
      "url": "https://github.com/doudoudedi/main-DIR-816_A1_Command-injection",
      "tags": [
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      "source": "cve@mitre.org"
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      "url": "https://www.dlink.com/en/security-bulletin/",
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      "source": "cve@mitre.org"
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      "url": "https://github.com/doudoudedi/main-DIR-816_A1_Command-injection",
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      "url": "https://www.dlink.com/en/security-bulletin/",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in D-Link DIR816_A1_FW101CNB04 750m11ac wireless router, The HTTP request parameter is used in the handler function of /goform/form2userconfig.cgi route, which can construct the user name string to delete the user function. This can lead to command injection through shell metacharacters."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto un problema en el router inalámbrico D-Link DIR816_A1_FW101CNB04 750m11ac, El parámetro de solicitud HTTP se utiliza en la función de manejador de la ruta /goform/form2userconfig.cgi, que puede construir la cadena de nombre de usuario para eliminar la función de usuario. Esto puede conducir a la inyección de comandos a través de metacaracteres del shell"
    }
  ],
  "lastModified": "2026-06-17T04:03:44.287",
  "configurations": [
    {
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        {
          "negate": false,
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  "sourceIdentifier": "cve@mitre.org"
}