CVE-2023-28802: Zscaler Client Connector

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

An Improper Validation of Integrity Check Value in Zscaler Client Connector on Windows allows an authenticated user to disable ZIA/ZPA by interrupting the service restart from Zscaler Diagnostics. This issue affects Client Connector: before 4.2.0.149.

Affected products

• Zscaler Client Connector: before 4.2.0.149 (fixed in 4.2.0.149)

Published 2023-11-21. Last modified 2026-06-17.