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CVE-2021-34409

Estado: ModificadaAlta (7.8)—

It was discovered that the installation packages of the Zoom Client for Meetings for MacOS (Standard and for IT Admin) installation before version 5.2.0, Zoom Client Plugin for Sharing iPhone/iPad before version 5.2.0, and Zoom Rooms for Conference before version 5.1.0, copy pre- and post- installation shell scripts to a user-writable directory. In the affected products listed below, a malicious actor with local access to a user's machine could use this flaw to potentially run arbitrary system commands in a higher privileged context during the installation process.

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 (3)

Zoom — MeetingsZoom — RoomsZoom — Screen Sharing

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-34409",
  "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": "CHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 1.1
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/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"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@zoom.us",
      "affectedData": [
        {
          "vendor": "Zoom Video Communications Inc",
          "product": "Zoom Client for Meetings for MacOS (Standard and for IT Admin)",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "5.2.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Zoom Video Communications Inc",
          "product": "Zoom Client Plugin for Sharing iPhone/iPad",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "5.2.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Zoom Video Communications Inc",
          "product": "Zoom Rooms for Conference",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "5.1.0",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-09-27T14:15:08.137",
  "references": [
    {
      "url": "https://explore.zoom.us/en/trust/security/security-bulletin",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@zoom.us"
    },
    {
      "url": "https://explore.zoom.us/en/trust/security/security-bulletin",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-732"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "It was discovered that the installation packages of the Zoom Client for Meetings for MacOS (Standard and for IT Admin) installation before version 5.2.0, Zoom Client Plugin for Sharing iPhone/iPad before version 5.2.0, and Zoom Rooms for Conference before version 5.1.0, copy pre- and post- installation shell scripts to a user-writable directory. In the affected products listed below, a malicious actor with local access to a user's machine could use this flaw to potentially run arbitrary system commands in a higher privileged context during the installation process."
    },
    {
      "lang": "es",
      "value": "Se ha detectado que los paquetes de instalación de Zoom Client for Meetings para MacOS (Standard y para IT Admin) antes de la versión 5.2.0, Zoom Client Plugin for Sharing iPhone/iPad antes de la versión 5.2.0, y Zoom Rooms for Conference antes de la versión 5.1.0, copian scripts de shell previos y posteriores a la instalación en un directorio escribible por el usuario. En los productos afectados que se enumeran a continuación, un actor malintencionado con acceso local a la máquina de un usuario podría utilizar este defecto para ejecutar potencialmente comandos arbitrarios del sistema en un contexto con mayores privilegios durante el proceso de instalación"
    }
  ],
  "lastModified": "2026-06-17T03:55:48.187",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:zoom:meetings:*:*:*:*:*:macos:*:*",
              "vulnerable": true,
              "matchCriteriaId": "37C37A72-A64B-4823-B1E1-4EB0B7283629",
              "versionEndExcluding": "5.2.0"
            },
            {
              "criteria": "cpe:2.3:a:zoom:rooms:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BA912D24-7983-4F87-B845-7464F24EE239",
              "versionEndExcluding": "5.1.0"
            },
            {
              "criteria": "cpe:2.3:a:zoom:screen_sharing:*:*:*:*:*:ipados:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7B7ED4B1-5A0F-4738-AC25-46846F3D1127",
              "versionEndExcluding": "5.2.0"
            },
            {
              "criteria": "cpe:2.3:a:zoom:screen_sharing:*:*:*:*:*:iphone_os:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FC50FFA5-57A1-4E3C-A53B-8B0622A437FA",
              "versionEndExcluding": "5.2.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@zoom.us"
}