8.1

CVE-2026-25687

ZCC race condition in ZPA tunnel handler

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerZscaler
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Produkt Client Connector
Default Statusunaffected
Version 4.6
Version < 4.6.0.486
Status affected
Version 4.7
Version < 4.7.0.350
Status affected
Version 4.8
Version < 4.8.0.267
Status affected
Version 4.9
Version < 4.9.0.412
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.23% 0.141
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
cve@zscaler.com 8.1 2.2 5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-366 Race Condition within a Thread

If two threads of execution use a resource simultaneously, there exists the possibility that resources may be used while invalid, in turn making the state of execution undefined.

https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026