What is CVE-2025-54983?

CVE-2025-54983 is a medium-severity vulnerability in Zscaler Client Connector, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 5.2/10. Published 2025-11-12.

How severe is CVE-2025-54983?

Medium severity. CVSS v3 base score is 5.2 out of 10.

Vulnerability in Zscaler Client Connector

CVE-2025-54983

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.

EPSS: 0.000 (3.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Zscaler Client Connector — versions 4.6, 4.7

Weakness classification (CWE)

CWE-772 — Missing Release of Resource after Effective Lifetime

References

help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-…

Frequently asked questions

What is CVE-2025-54983?: CVE-2025-54983 is a medium-severity vulnerability in Zscaler Client Connector, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 5.2/10. Published 2025-11-12.
How severe is CVE-2025-54983?: Medium severity. CVSS v3 base score is 5.2 out of 10.