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CVE-2021-28152

Estado: ModificadaCrítica (9.8)—

Hongdian H8922 3.0.5 devices have an undocumented feature that allows access to a shell as a superuser. To connect, the telnet service is used on port 5188 with the default credentials of root:superzxmn.

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)

Hongdian — H8922 Firmware

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-28152",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "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"
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        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
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        "userInteractionRequired": false
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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",
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  "affected": [
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      "affectedData": [
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  "published": "2021-05-06T16:15:07.417",
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      "url": "http://en.hongdian.com/Products/Details/H8922",
      "tags": [
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      "tags": [
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      "source": "cve@mitre.org"
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  "vulnStatus": "Modified",
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      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
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  "descriptions": [
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      "lang": "en",
      "value": "Hongdian H8922 3.0.5 devices have an undocumented feature that allows access to a shell as a superuser. To connect, the telnet service is used on port 5188 with the default credentials of root:superzxmn."
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      "lang": "es",
      "value": "Los dispositivos Hongdian H8922 versión 3.0.5, presentan una función no documentada que permite el acceso a un shell como superusuario. Para conectarse, el servicio telnet es usado en el puerto 5188 con las credenciales predeterminadas root:superzxmn"
    }
  ],
  "lastModified": "2026-06-17T03:45:53.340",
  "configurations": [
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