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CVE-2021-25309

Estado: ModificadaCrítica (9.8)—

The telnet administrator service running on port 650 on Gigaset DX600A v41.00-175 devices does not implement any lockout or throttling functionality. This situation (together with the weak password policy that forces a 4-digit password) allows remote attackers to easily obtain administrative access via brute-force attacks.

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)

Gigaset — Dx600a Firmware

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-25309",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
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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",
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  "affected": [
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      "affectedData": [
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  "published": "2021-03-02T01:15:12.697",
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    {
      "url": "https://research.nccgroup.com/2021/02/28/technical-advisory-administrative-passcode-recovery-and-authenticated-remote-buffer-overflow-vulnerabilities-in-gigaset-dx600a-handset-cve-2021-25309-cve-2021-25306/",
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    {
      "url": "https://research.nccgroup.com/2021/02/28/technical-advisory-administrative-passcode-recovery-and-authenticated-remote-buffer-overflow-vulnerabilities-in-gigaset-dx600a-handset-cve-2021-25309-cve-2021-25306/",
      "tags": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-307"
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        {
          "lang": "en",
          "value": "CWE-521"
        }
      ]
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      "value": "The telnet administrator service running on port 650 on Gigaset DX600A v41.00-175 devices does not implement any lockout or throttling functionality. This situation (together with the weak password policy that forces a 4-digit password) allows remote attackers to easily obtain administrative access via brute-force attacks."
    },
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      "lang": "es",
      "value": "El servicio de administrador de telnet que se ejecuta en el puerto 650 en los dispositivos Gigaset DX600A versión v41.00-175, no implementa ninguna funcionalidad de bloqueo o limitación. Esta situación (junto con la política de contraseña débil que forza una contraseña de 4 dígitos) permite a los atacantes remotos obtener fácilmente acceso administrativo por medio de ataques de fuerza bruta"
    }
  ],
  "lastModified": "2026-06-17T03:41:48.123",
  "configurations": [
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