CVE-2024-23458: Local Privilege Escalation on Zscaler Client Connector on Windows

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-08-06 · updated 2026-06-17
Weakness: CWE-346

Description

While copying individual autoupdater log files, reparse point check was missing which could result into crafted attacks, potentially leading to a local privilege escalation. This issue affects Zscaler Client Connector on Windows <4.2.0.190.

Affected products

Zscaler Client Connector: before 4.2.0.190 — fixed in 4.2.0.190

How to fix

Upgrade to a fixed version: Zscaler Client Connector 4.2.0.190. Check the vendor advisory for mitigations.

References

https://help.zscaler.com/client-connector/client-connector-app-release-summary-2023?applicable_category=windows&applicable_version=4.2.0.190

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