CVE-2025-54983
Health check port on ZCC allows tunnel bypass
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 5.2EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
12 Nov 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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 ConnectorWant to know if your infrastructure is exposed to this?
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