Client Connector
CVE-2021-26734: Junction Delete leading to elevation of privilege
Zscaler Client Connector Installer on Windows before version 3.4.0.124 improperly handled directory junctions during uninstallation.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityMEDIUMCVSS 3.1 4.4
EPSS0.14%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 0 | 3.4.0.124 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Zscaler Client Connector Installer on Windows before version 3.4.0.124 improperly handled directory junctions during uninstallation. A local adversary may be able to delete folders in an elevated context.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.