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CVE-2021-43666

Estado: ModificadaAlta (7.5)—

A Denial of Service vulnerability exists in mbed TLS 3.0.0 and earlier in the mbedtls_pkcs12_derivation function when an input password's length is 0.

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 (2)

ARM — Mbed TLSDebian — Debian Linux

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-43666",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-43666",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
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              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2025-12-02T20:50:55.350518Z"
        }
      }
    ],
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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        "type": "Primary",
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        "cvssData": {
          "scope": "UNCHANGED",
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  "affected": [
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  "published": "2022-03-24T18:15:08.333",
  "references": [
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      "url": "https://github.com/ARMmbed/mbedtls/issues/5136",
      "tags": [
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    {
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "value": "A Denial of Service vulnerability exists in mbed TLS 3.0.0 and earlier in the mbedtls_pkcs12_derivation function when an input password's length is 0."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de denegación de servicio en mbed TLS 3.0.0 y anteriores, en la función mbedtls_pkcs12_derivation cuando la longitud de una contraseña de entrada es 0"
    }
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  "lastModified": "2026-06-17T04:11:14.677",
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}