CVE-2026-59564
Authentication bypass between ZCC and client connector portal
CVSS Score
9.1
EPSS Score
0.0%
EPSS Percentile
0th
An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.
| CWE | CWE-304 |
| Vendor | zscaler |
| Product | client connector |
| Published | Aug 24, 2026 |
| Last Updated | Aug 24, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Zscaler / Client Connector
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