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CVE-2020-4821

Estado: ModificadaCrítica (9.8)—

IBM InfoSphere Data Replication 11.4 and IBM InfoSphere Change Data Capture for z/OS 10.2.1, under certain configurations, could allow a user to bypass authentication mechanisms using an empty password string. IBM X-Force ID: 189834

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)

IBM — Infosphere Change Data CaptureIBM — Infosphere Data Replication

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2020-4821",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
        "impactScore": 6.4,
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
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          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
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    "cvssMetricV31": [
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  "published": "2021-07-16T17:15:11.993",
  "references": [
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      "source": "psirt@us.ibm.com"
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "IBM InfoSphere Data Replication 11.4 and IBM InfoSphere Change Data Capture for z/OS 10.2.1, under certain configurations, could allow a user to bypass authentication mechanisms using an empty password string. IBM X-Force ID: 189834"
    },
    {
      "lang": "es",
      "value": "IBM InfoSphere Data Replication versión 11.4 e IBM InfoSphere Change Data Capture para z/OS versión 10.2.1, bajo determinadas configuraciones, podrían permitir a un usuario omitir los mecanismos de autenticación usando una cadena de contraseña vacía. IBM X-Force ID: 189834"
    }
  ],
  "lastModified": "2026-06-17T03:20:30.780",
  "configurations": [
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}