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CVE-2021-43931

Estado: ModificadaCrítica (9.8)—

The authentication algorithm of the WebHMI portal is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.

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)

Webhmi — Webhmi Firmware

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-43931",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "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"
        },
        "acInsufInfo": false,
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    "cvssMetricV31": [
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          "scope": "UNCHANGED",
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          "attackVector": "NETWORK",
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  "affected": [
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              "versionType": "custom"
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  "published": "2021-12-06T18:15:08.303",
  "references": [
    {
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-336-03",
      "tags": [
        "Patch",
        "Third Party Advisory",
        "US Government Resource"
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      "source": "ics-cert@hq.dhs.gov"
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      "tags": [
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        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The authentication algorithm of the WebHMI portal is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error."
    },
    {
      "lang": "es",
      "value": "El algoritmo de autenticación del portal WebHMI es sólido, pero el mecanismo implementado puede ser omitido como resultado de una debilidad independiente que es primaria al error de autenticación"
    }
  ],
  "lastModified": "2026-06-17T04:11:38.927",
  "configurations": [
    {
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  "sourceIdentifier": "ics-cert@hq.dhs.gov"
}