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CVE-2021-29296

Estado: ModificadaAlta (7.5)—

Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02, which could let a remote malicious user cause a denial of service. The vulnerability could be triggered by sending an HTTP request with URL /vct_wan; the sbin/httpd would invoke the strchr function and take NULL as a first argument, which finally leads to the segmentation fault. NOTE: The DIR-825 and all hardware revisions is considered End of Life and as such this issue will not be patched

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-825 Firmware

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-29296",
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          "id": "CVE-2021-29296",
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          "options": [
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              "exploitation": "none"
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              "automatable": "yes"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2024-05-14T18:07:24.506794Z"
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          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
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          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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  "published": "2021-08-10T20:15:08.530",
  "references": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "CWE-476"
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  "descriptions": [
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      "lang": "en",
      "value": "Null Pointer Dereference vulnerability in D-Link DIR-825 2.10b02, which could let a remote malicious user cause a denial of service. The vulnerability could be triggered by sending an HTTP request with URL /vct_wan; the sbin/httpd would invoke the strchr function and take NULL as a first argument, which finally leads to the segmentation fault. NOTE: The DIR-825 and all hardware revisions is considered End of Life and as such this issue will not be patched"
    },
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      "lang": "es",
      "value": "** NO COMPATIBLE CUANDO SE ASIGNÓ ** Vulnerabilidad de Desreferencia de Puntero Null en D-Link DIR-825 versión 2.10b02, que podría permitir a un usuario malicioso remoto causar una denegación de servicio. La vulnerabilidad podría ser desencadenada mediante el envío de una petición HTTP con la URL /vct_wan; el sbin/httpd invocaría la función strchr y tomaría NULL como primer argumento, lo que finalmente conlleva a el fallo de segmentación. NOTA: El DIR-825 y todas las revisiones de hardware se consideran Fin de Vida y como tal este problema no será parcheado"
    }
  ],
  "lastModified": "2026-06-17T03:47:29.747",
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