Startup Configuration Flaw in Zscaler Client Connector Causes Traffic Inspection Bypass

Publication date: 2026-03-31

Last updated on: 2026-04-06

Assigner: Zscaler, Inc.

Description

An incorrect startup configuration of affected versions of Zscaler Client Connector on Windows may cause a limited amount of traffic from being inspected under rare circumstances.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-03-31

Last Modified

2026-04-06

Generated

2026-07-07

AI Q&A

2026-03-31

EPSS Evaluated

2026-07-06

NVD

CVE-2026-22569

EUVD

EUVD-2026-17478

Affected Vendors & Products

Vendor	Product	Version / Range
zscaler	client_connector	From 4.7 (inc) to 4.7.0.141 (exc)
zscaler	client_connector	From 4.8 (inc) to 4.8.0.63 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-1289	The product receives an input value that is used as a resource identifier or other type of reference, but it does not validate or incorrectly validates that the input is equivalent to a potentially-unsafe value.

Attack-Flow Graph

Executive Summary

This vulnerability is caused by an incorrect startup configuration in certain versions of the Zscaler Client Connector on Windows. Under rare circumstances, this misconfiguration may result in a limited amount of network traffic not being inspected as intended.

Impact Analysis

Because some traffic may bypass inspection due to this vulnerability, there is a risk that malicious or unauthorized data could pass through without detection. This could potentially lead to security risks such as data leakage or exposure to threats that would normally be blocked or monitored.

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