Lack of input santization on Zscaler Client Connector enables arbitrary code execution

published 2024-03-26 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-46432

cvss: 7.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits: 0; none known

ZSATray passes the previousInstallerName as a config parameter to TrayManager, and TrayManager constructs the path and appends previousInstallerName to get the full path of the exe. Fixed Version: Win ZApp 4.3.0.121 and later.

Patch / fix

fixed in 2

Zscaler Client Connector 4.3.0.121
zscaler client_connector 4.3.0.121

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-08-05)

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.3	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Zscaler Client Connector
zscaler client_connector

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

help.zscaler.com /client-connector/client-connector-app-release-summary-2023?applicable_category=Windows&applicable_version=4.3
release-notes

Sources

CVE List CVE-2023-41973
NVD CVE-2023-41973

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Summary