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CVE-2021-21816

Estado: ModificadaMedia (4.3)—💥 Exploit

An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to the disclosure of sensitive information. An attacker can send an HTTP request to trigger this vulnerability.

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).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

Tecnologías afectadas (1)

Dlink — Dir-3040 Firmware

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-21816",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
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  "affected": [
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      "affectedData": [
        {
          "vendor": "n/a",
          "product": "D-LINK",
          "versions": [
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              "status": "affected",
              "version": "D-LINK DIR-3040 1.13B03"
            }
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  ],
  "published": "2021-07-16T11:15:09.900",
  "references": [
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      "tags": [
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      "source": "talos-cna@cisco.com"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "talos-cna@cisco.com",
      "description": [
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          "value": "CWE-200"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to the disclosure of sensitive information. An attacker can send an HTTP request to trigger this vulnerability."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de Divulgación de Información en la funcionalidad de Syslog de D-LINK DIR-3040 versión 1.13B03. Una petición de red especialmente diseñada puede conllevar a la divulgación de información confidencial. Un atacante puede enviar una petición HTTP para desencadenar esta vulnerabilidad"
    }
  ],
  "lastModified": "2026-06-17T03:36:10.207",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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  "sourceIdentifier": "talos-cna@cisco.com"
}