High severity · published Sep 14, 2026
CVE-2026-59570
Android ZCC denial of service
7.5
CVSS
0.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CC
Client Connector · Zscaler
before Android: 4.2.0.152; before ChromeOS: 4.2.0.152 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59570
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59570
help.zscaler.com
https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026
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