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Vulnerability record · CVE-2026-25687 · published 14 September 2026

CVE-2026-25687: A race condition in the ZPA tunnel handler of affected versions of Zscaler Client Connector (ZCC) allows a hea…

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.

8.1 CVSS 3.1 High EPSS 0.38% · top 70.6% CWE-366 · CWE-366 Awaiting Analysis
8.1CVSS 3.1 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
18 Sep 2026Last modified by NVD

Description

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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-25687), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.