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CVE-2021-20091

Estado: ModificadaAlta (8.8)—💥 Exploit

The web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 do not properly sanitize user input. An authenticated remote attacker could leverage this vulnerability to alter device configuration, potentially gaining remote code execution.

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 (2)

Buffalo — Wsr-2533dhp3-bk FirmwareBuffalo — Wsr-2533dhpl2-bk Firmware

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-20091",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 6.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
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        "userInteractionRequired": false
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          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
        "exploitabilityScore": 2.8
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  "affected": [
    {
      "source": "vulnreport@tenable.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3",
          "versions": [
            {
              "status": "affected",
              "version": "WSR-2533DHPL2 <=1.02, WSR-2533DHP3 <= 1.24"
            }
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  "published": "2021-04-29T15:15:10.660",
  "references": [
    {
      "url": "https://www.tenable.com/security/research/tra-2021-13",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "vulnreport@tenable.com"
    },
    {
      "url": "https://www.tenable.com/security/research/tra-2021-13",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "NVD-CWE-noinfo"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 do not properly sanitize user input. An authenticated remote attacker could leverage this vulnerability to alter device configuration, potentially gaining remote code execution."
    },
    {
      "lang": "es",
      "value": "Las interfaces web de Buffalo WSR-2533DHPL2 versión de firmware anterior a 1.02 e incluyéndola y WSR-2533DHP3 versión de firmware anterior a 1.24 e incluyéndola, no sanean apropiadamente una entrada del usuario.&#xa0;Un atacante remoto autenticado podría aprovechar esta vulnerabilidad para alterar la configuración del dispositivo, potencialmente consiguiendo una ejecución de código remota"
    }
  ],
  "lastModified": "2026-06-17T03:33:15.640",
  "configurations": [
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