CVE-2026-25687

8.1 highEPSS 0.4%

High (8.1). EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

8.1 high

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

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-31)
CWE: CWE-366
Published: 2026-09-14
Modified: 2026-09-18
Record from: the NVD, synced 2026-10-19

References

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

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