# CVE-2026-25687

## Summary

- **CVE ID:** CVE-2026-25687
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-366
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 15, 2026

## 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.

## Affected Products

- Zscaler — Client Connector (4.6)
- Zscaler — Client Connector (4.7)
- Zscaler — Client Connector (4.8)
- Zscaler — Client Connector (4.9)

## References

- [CNA](https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.23%
- **EPSS Percentile:** 14.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._