CVE-2026-59564
Received Received - Intake

Authentication Bypass in Zscaler Client Connector

Publication date: 2026-08-24

Last updated on: 2026-08-24

Assigner: Zscaler, Inc.

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

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Meta Information

Published
2026-08-24
Last Modified
2026-08-24
Generated
2026-08-24
AI Q&A
2026-08-24
EPSS Evaluated
N/A
NVD
CVE-2026-59564
EUVD
EUVD-2026-64860

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
zscaler zscaler_client_connector *
zscaler zscaler_client_connector_portal *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-304 The product implements an authentication technique, but it skips a step that weakens the technique.

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Executive Summary

This vulnerability is an authentication bypass issue affecting certain versions of Zscaler Client Connector and its portal. It allows unauthorized access to systems by bypassing normal authentication controls.

Impact Analysis

An attacker could exploit this to gain unauthorized access to your network or data, potentially leading to data breaches, system compromise, or further lateral movement within your environment.

Compliance Impact

This vulnerability could lead to unauthorized data access, violating GDPR's data protection requirements or HIPAA's safeguards for protected health information, potentially resulting in legal penalties and reputational damage.

Mitigation Strategies

Update the Zscaler Client Connector to the latest version provided by Zscaler to address the authentication bypass issue.

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