CVE-2025-54983: medium-severity vulnerability in Zscaler Client Connector
Health check port on ZCC allows tunnel bypass
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.2epss 0.1%
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Affected products
Zscaler · Zscaler Client ConnectorRelated CVEs — Zscaler Client Connector
In the same product, most dangerous first.