CVE-2025-54983 MEDIUM

CVE-2025-54983: Health check port on ZCC allows tunnel bypass

Vendor Zscaler
Product Zscaler Client Connector
Weakness CWE-772
Published November 12, 2025
Last update November 12, 2025
View on NVD All CVEs

CVSS base score

5.2/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

What the vulnerability does

01Description

A health check port on Zscaler Client Connector on Windows, versions 4.6 < 4.6.0.216 and 4.7 < 4.7.0.47, which under specific circumstances was not released after use, allowed traffic to potentially bypass ZCC forwarding controls.

Key dates

02Disclosure timeline

November 12, 2025 CVE published
November 12, 2025 Record updated