What is CVE-2026-25687?

CVE-2026-25687 is a high-severity vulnerability in Zscaler Client Connector, classified under Race Condition within a Thread. CVSS score: 8.1/10. Published 2026-09-14.

How severe is CVE-2026-25687?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Zscaler Client Connector

CVE-2026-25687

A race condition in the ZPA tunnel handler of affected versions of Zscaler Client Connector (ZCC) allows a heap corruption, resulting in a denial of service (client crash) and potentially arbitrary code execution in the context of the ZCC process.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Zscaler Client Connector

Weakness classification (CWE)

CWE-366 — Race Condition within a Thread

References

cve@zscaler.com

Frequently asked questions

What is CVE-2026-25687?: CVE-2026-25687 is a high-severity vulnerability in Zscaler Client Connector, classified under Race Condition within a Thread. CVSS score: 8.1/10. Published 2026-09-14.
How severe is CVE-2026-25687?: High severity. CVSS v3 base score is 8.1 out of 10.