CVE-2026-59570 PUBLISHED

Android ZCC denial of service

Assigner: Zscaler
Reserved: 06.07.2026 Published: 14.09.2026 Updated: 14.09.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
CVSS Score: 7.5

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

CVSS 3.1

Product Status

Vendor	Zscaler
Product	Client Connector
Versions	Default: unaffected affected from 0 to Android: 4.2.0.152 (excl.) affected from 0 to ChromeOS: 4.2.0.152 (excl.)

References

https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026

Problem Types

CWE-20 Improper input validation CWE

Impacts

CAPEC-233 Privilege Escalation