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TI-2023-22356 Aliases CVE-2023-41973GHSA-9q9g-6mgq-4cf7

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

Priority LOW 36CWE-22Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00313 24th percentileScored 2026-11-07
Fix Fixed Client Connector (Zscaler): 4.3.0.121

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZscalerClient Connectorbefore 4.3.0.1214.3.0.121Patch availableCNA
  • Client Connector VendorZscaler Affected before 4.3.0.121 Fixed in 4.3.0.121 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:windows:*:*before 4.3.0.121VulnerableZscaler
  • cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:windows:*:* Versions before 4.3.0.121 Vulnerable ·Zscaler

Remediation

  • Fix · CNA Client Connector (Zscaler) Fixed in 4.3.0.121

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Zscaler Client Connector 4.3.0.121

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2023-22355 Revert password check incorrect type validationPriority LOW 36
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-41973
  2. 2026-10-03 Alias added: GHSA-9q9g-6mgq-4cf7

References

Other 1

  • TI-2020-09334 The Zscaler Client Connector for Windows prior to 2.1.2.74 had a stack based buffer… CVSS 3.1CRITICAL 9.8
  • TI-2024-15528 Local Privilege Escalation via lack of input validation CVSS 3.1CRITICAL 9.8
  • TI-2024-15526 Insecure MacOS code sign check fallback CVSS 3.1CRITICAL 9.8
  • TI-2024-15505 Multiple Arbitrary Creates/Overwrites by link following CVSS 3.1CRITICAL 9.8
  • TI-2023-13308 Out-of-bounds write to heap in pacparser CVSS 3.1CRITICAL 9.8
  • TI-2023-13315 ZCC on Linux privilege escalation CVSS 3.1CRITICAL 9.8
See all 40 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences