Client Connector
CVE-2026-59565: Local and kernel denial-of-service
A remotely exploitable buffer overflow bug can cause a local and kernel denial-of-service attack on affected versions of Zscaler Client Connector on Windows.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityHIGHCVSS 3.1 8.8
EPSS0.48%Chance of exploitation in 30 days
Public exploitNot tracked
FixAvailable
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Client Connector (Windows) 0 | Windows: 4.6.0.457, 4.7.0.317, 4.8.0.232, 4.9.0.372 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A remotely exploitable buffer overflow bug can cause a local and kernel denial-of-service attack on affected versions of Zscaler Client Connector on Windows.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.