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CVE-2025-54983

Health check port on ZCC allows tunnel bypass

Published: Nov 12, 2025Updated: Nov 12, 2025 Sources: CVE List NVDCWE-772
NVD MITRE
5.2CVSSMEDIUM
EPSS Score
0.1%
Top 98.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:CC:LI:LA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-772

Affected Products

Zscaler Client ConnectorZscaler
SaaS
Security Products / secure-gateway-vpn
zscalercommercialUSSecurity Productsaka client connector, zscaler internet access admin portal, zia admin ui, zia

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2025
help.zscaler.com

Timeline

Published
Nov 12, 2025
Last Updated
Nov 12, 2025

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