What is CVE-2026-59570?

CVE-2026-59570 is a high-severity vulnerability in Zscaler Client Connector, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-09-14.

How severe is CVE-2026-59570?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Zscaler Client Connector

CVE-2026-59570

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.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H.

Affected products

Zscaler Client Connector

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

cve@zscaler.com

Frequently asked questions

What is CVE-2026-59570?: CVE-2026-59570 is a high-severity vulnerability in Zscaler Client Connector, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-09-14.
How severe is CVE-2026-59570?: High severity. CVSS v3 base score is 7.5 out of 10.