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

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Zscaler Client Connector affected
Version Status Constraints
0 affected < Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0.372
0 affected < MacOS: 4.5.2.312, 4.7.0.292, 4.8.0.191
0 affected < iOS: 4.5.1
0 affected < Android: 4.2
0 affected < ChromeOS: 4.2
0 affected < Linux: 3.7.2.64, 4.2.1.64

No data.

No data.

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Vendors Products
Zscaler Subscribe
Client Connector Subscribe

Project Subscriptions

Vendors Products
Zscaler Subscribe
Client Connector Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026 cve-icon cve-icon
History

Mon, 24 Aug 2026 16:15:00 +0000

Type Values Removed Values Added
First Time appeared Zscaler
Zscaler client Connector
Vendors & Products Zscaler
Zscaler client Connector

Mon, 24 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Mon, 24 Aug 2026 13:45:00 +0000

Type Values Removed Values Added
Description An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.
Title Authentication bypass between ZCC and client connector portal
Weaknesses CWE-304
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Zscaler

Published:

Updated: 2026-08-24T13:53:12.432Z

Reserved: 2026-07-06T06:18:59.633Z

Link: CVE-2026-59564

cve-icon Vulnrichment

Updated: 2026-08-24T13:51:53.702Z

cve-icon NVD

Status : Received

Published: 2026-08-24T14:16:55.690

Modified: 2026-08-24T14:16:55.690

Link: CVE-2026-59564

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-24T17:00:04Z

Weaknesses