CVE-2026-25687 — HIGH (8.1)

Vulnerability 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 Score

8.1

HIGH

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-366

References

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

FAQ

What is CVE-2026-25687?

CVE-2026-25687 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 co...

How severe is CVE-2026-25687?

CVE-2026-25687 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-25687?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.