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High 8.1Published Sep 14, 2026
CVE-2026-25687ZCC race condition in ZPA tunnel handler
Updated under an hour ago ()
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It affects Zscaler Client Connector. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-366
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Zscaler
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Zscaler Client Connector zscaler:client_connector (from the name) | from 4.6 before 4.6.0.486; from 4.7 before 4.7.0.350; from 4.8 before 4.8.0.267; from 4.9 before 4.9.0.412 | CNA record |
References
- https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.