Answer in brief
CVE-2026-59564 records a Unknown severity vulnerability in Authentication bypass between ZCC and client connector portal. The current sources do not mark it as known exploited. The current feed maps Zscaler/Client Connector (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Zscaler/Client Connector (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Zscaler/Client Connectorgeneric | >=0 <Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0.372 || >=0 <MacOS: 4.5.2.312, 4.7.0.292, 4.8.0.191 || >=0 <iOS: 4.5.1 || >=0 <Android: 4.2 || >=0 <ChromeOS: 4.2 || >=0 <Linux: 3.7.2.64, 4.2.1.64 | Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0.372, MacOS: 4.5.2.312, 4.7.0.292, 4.8.0.191, iOS: 4.5.1, Android: 4.2, ChromeOS: 4.2, Linux: 3.7.2.64, 4.2.1.64 |
Published upstream
Aug 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 24, 2026
An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.
Quoted source text, attributed separately from HOL analysis.