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CVE-2026-59564

Estado: Pendiente de análisisCrítica (9.1)—

An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N/PR:N/UI:N indica explotación remota sin privilegios ni interacción (T1190). CWE-304 (authentication bypass) permite acceso no autorizado a cuentas o sesiones (T1078.001), con posible creación/modificación de cuentas de servicio (T1098.002).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementMulti-factor AuthenticationVulnerability ScanningPassword PoliciesNetwork SegmentationLimit Access to Resource Over Network

Tecnologías afectadas (2)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Zscaler — Client ConnectorAIZscaler — Client Connector PortalAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-59564",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-59564",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-24T00:00:00+00:00"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "cve@zscaler.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.1,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@zscaler.com",
      "affectedData": [
        {
          "vendor": "Zscaler",
          "product": "Client Connector",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0.372",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "0",
              "lessThan": "MacOS: 4.5.2.312, 4.7.0.292, 4.8.0.191",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "0",
              "lessThan": "iOS: 4.5.1",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "0",
              "lessThan": "Android: 4.2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "0",
              "lessThan": "ChromeOS: 4.2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "0",
              "lessThan": "Linux: 3.7.2.64, 4.2.1.64",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "Windows",
            "MacOS",
            "Linux",
            "iOS",
            "Android"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-24T14:16:55.690",
  "references": [
    {
      "url": "https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026",
      "source": "cve@zscaler.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cve@zscaler.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-304"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal."
    }
  ],
  "lastModified": "2026-08-28T18:39:48.167",
  "sourceIdentifier": "cve@zscaler.com"
}