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CVE-2021-34426

Estado: ModificadaAlta (7.8)—

Se ha detecado una vulnerabilidad en el cliente Keybase para Windows antes de la versión 5.6.0 cuando un usuario ejecutaba el comando "keybase git lfs-config" en la línea de comandos. En las versiones anteriores a la 5.6.0, un actor malicioso con acceso de escritura al repositorio Git de un usuario podía aprovechar esta vulnerabilidad para ejecutar potencialmente comandos arbitrarios de Windows en el sistema local de un usuario

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)

Keybase — Keybase

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-34426",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.2,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@zoom.us",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
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        "exploitabilityScore": 1.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "attackVector": "LOCAL",
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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  },
  "affected": [
    {
      "source": "security@zoom.us",
      "affectedData": [
        {
          "vendor": "Zoom Video Communications Inc",
          "product": "Keybase Client for Windows",
          "versions": [
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              "status": "affected",
              "version": "unspecified",
              "lessThan": "5.6.0",
              "versionType": "custom"
            }
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    }
  ],
  "published": "2021-12-14T20:15:07.437",
  "references": [
    {
      "url": "https://explore.zoom.us/en/trust/security/security-bulletin",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security@zoom.us"
    },
    {
      "url": "https://explore.zoom.us/en/trust/security/security-bulletin",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was discovered in the Keybase Client for Windows before version 5.6.0 when a user executed the \"keybase git lfs-config\" command on the command-line. In versions prior to 5.6.0, a malicious actor with write access to a user\\'s Git repository could leverage this vulnerability to potentially execute arbitrary Windows commands on a user\\'s local system."
    },
    {
      "lang": "es",
      "value": "Se ha detecado una vulnerabilidad en el cliente Keybase para Windows antes de la versión 5.6.0 cuando un usuario ejecutaba el comando \"keybase git lfs-config\" en la línea de comandos. En las versiones anteriores a la 5.6.0, un actor malicioso con acceso de escritura al repositorio Git de un usuario podía aprovechar esta vulnerabilidad para ejecutar potencialmente comandos arbitrarios de Windows en el sistema local de un usuario"
    }
  ],
  "lastModified": "2026-06-17T03:55:50.403",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "matchCriteriaId": "EB47E767-AB7D-40EA-BC26-2BCA3FD29271",
              "versionEndExcluding": "5.6.0"
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  "sourceIdentifier": "security@zoom.us"
}