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HIGH

CVE-2026-25687

CVSS v3

8.1

HIGH

EPSS Score

0.4 %

exploit probability, as of 2026-09-28

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published
2026-09-14
Last Modified
2026-09-15

Frequently asked questions

What is 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.

Is CVE-2026-25687 actively exploited?

Active exploitation of CVE-2026-25687 has not been confirmed. Its EPSS score was 0.4% on 2026-09-28, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-25687?

CVE-2026-25687 has a CVSS v3 base score of 8.1 (HIGH severity).

Is CVE-2026-25687 affecting your environment?

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