Advisoriesby IbisZscalerCVE-2026-25687
Zscaler Client Connector: race condition
Fix: upgrade to 4.6.0.486 or later (4 fixed versions below)
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Client Connector Product | >= 4.6, < 4.6.0.486 | 4.6.0.486 |
| >= 4.7, < 4.7.0.350 | 4.7.0.350 | |
| >= 4.8, < 4.8.0.267 | 4.8.0.267 | |
| >= 4.9, < 4.9.0.412 | 4.9.0.412 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-366