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

> CVE-2025-54983: Health check port on ZCC allows tunnel bypass. CVSS 5.2 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-54983
Last updated: 2026-10-18T20:10:00Z

- Published: 2025-11-12 03:07 UTC · Updated: 2026-10-18 20:10 UTC · Assigner: Zscaler
- CVSS: 5.2 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- EPSS: 0.13%, 3th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-772

## Description

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.

## Affected vendors and products

- Zscaler: Zscaler Client Connector

## Tracked companies

- [Zscaler](https://rewindex.com/company/zscaler.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-54983)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-54983)
- [https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2025](https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2025)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-54983 · Markdown: https://rewindex.com/cve/CVE-2025-54983.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-54983 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:32.888Z