Read the docs
TI-2023-13315 Aliases CVE-2023-28805GHSA-5f5r-qwxj-xhxq

ZCC on Linux privilege escalation

Priority MEDIUM 42CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.

Summary

An Improper Input Validation vulnerability in Zscaler Client Connector on Linux allows Privilege Escalation. This issue affects Client Connector: before 1.4.0.105

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00372 31st percentileScored 2026-11-07
Fix Fixed Client Connector (Zscaler): 1.4.0.105

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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 1.4.0.1051.4.0.105Patch availableCNA
  • Client Connector VendorZscaler Affected before 1.4.0.105 Fixed in 1.4.0.105 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:linux:*:*before 1.4.0.105VulnerableZscaler
  • cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:linux:*:* Versions before 1.4.0.105 Vulnerable ·Zscaler

Remediation

  • Fix · CNA Client Connector (Zscaler) Fixed in 1.4.0.105

Fixed in the same release

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

  • Release ·

    Zscaler Client Connector 1.4.0.105

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2023-13314 Linux ZCC allows unsigned updates, allowing elevated Code ExecutionPriority MEDIUM 41
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-28805
  2. 2026-10-03 Alias added: GHSA-5f5r-qwxj-xhxq

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-2023-13314 Linux ZCC allows unsigned updates, allowing elevated Code Execution CVSS 3.1HIGH 8.2
See all 40 →

Sources

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