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Client Connector CVE-2026-59570

| EUVDEUVD-2026-77540 HIGH
Improper Input Validation (CWE-20)
2026-09-14 Zscaler GHSA-cj79-f7p8-r2fv
7.5
CVSS 3.1 · Vendor: Zscaler
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Severity by source

Vendor (Zscaler) PRIMARY
7.5 HIGH
AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H

Primary rating from Vendor (Zscaler) · only source for this CVE.

CVSS VectorVendor: Zscaler

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Sep 15, 2026 - 11:32 vuln.today
CVE Published
Sep 14, 2026 - 14:47 cve.org
HIGH 7.5

DescriptionCVE.org

On affected versions of Zscaler client connector, a pre-installed peer app can tear down the Zscaler tunnel, force user logout, and toggle packet capture.

AnalysisAI

A pre-installed peer application on the same device can abuse the Zscaler Client Connector to tear down the Zscaler tunnel, force the user to be logged out, and toggle packet capture on affected ChromeOS and Android builds prior to 4.2.0.152. The flaw is rated CVSS 7.5 with a local attack vector, high complexity and low privileges, reflecting that an attacker must already have a separate app installed on the managed endpoint rather than reaching the connector over the network. …

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CVE-2026-59570 vulnerability details – vuln.today

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