Client Connector Zscaler Client Connector

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By the Year

In 2025 there have been 0 vulnerabilities in Zscaler Client Connector. Last year, in 2024 Client Connector had 7 security vulnerabilities published. Right now, Client Connector is on track to have less security vulnerabilities in 2025 than it did last year.

Year Vulnerabilities Average Score
2025 0 0.00
2024 7 7.41
2023 16 6.88
2022 0 0.00
2021 3 8.47
2020 0 0.00
2019 0 0.00
2018 0 0.00

It may take a day or so for new Client Connector vulnerabilities to show up in the stats or in the list of recent security vulnerabilties. Additionally vulnerabilities may be tagged under a different product or component name.

Recent Zscaler Client Connector Security Vulnerabilities

An Improper Validation of signature in Zscaler Client Connector on Windows allows an authenticated user to disable anti-tampering

CVE-2023-28806 6.5 - Medium - August 06, 2024

An Improper Validation of signature in Zscaler Client Connector on Windows allows an authenticated user to disable anti-tampering. This issue affects Client Connector on Windows <4.2.0.190.

Improper Verification of Cryptographic Signature

Anti-tampering can be disabled under certain conditions without signature validation

CVE-2024-23456 7.5 - High - August 06, 2024

Anti-tampering can be disabled under certain conditions without signature validation. This affects Zscaler Client Connector <4.2.0.190 with anti-tampering enabled.

Improper Verification of Cryptographic Signature

While copying individual autoupdater log files, reparse point check was missing

CVE-2024-23458 7.8 - High - August 06, 2024

While copying individual autoupdater log files, reparse point check was missing which could result into crafted attacks, potentially leading to a local privilege escalation. This issue affects Zscaler Client Connector on Windows <4.2.0.190.

Origin Validation Error

The Zscaler Updater process does not validate the digital signature of the installer before execution

CVE-2024-23460 7.8 - High - August 06, 2024

The Zscaler Updater process does not validate the digital signature of the installer before execution, allowing arbitrary code to be locally executed. This affects Zscaler Client Connector on MacOS <4.2.

Improper Verification of Cryptographic Signature

In certain cases, Zscaler Internet Access (ZIA) can be disabled by PowerShell commands with admin rights

CVE-2024-23464 4.9 - Medium - August 06, 2024

In certain cases, Zscaler Internet Access (ZIA) can be disabled by PowerShell commands with admin rights. This affects Zscaler Client Connector on Windows <4.2.1

An Improper Input Validation vulnerability in Zscaler Client Connector on MacOS allows OS Command Injection

CVE-2024-23483 9.8 - Critical - August 06, 2024

An Improper Input Validation vulnerability in Zscaler Client Connector on MacOS allows OS Command Injection. This issue affects Zscaler Client Connector on MacOS <4.2.

Shell injection

DHCP can add routes to a clients routing table via the classless static route option (121)

CVE-2024-3661 7.6 - High - May 06, 2024

DHCP can add routes to a clients routing table via the classless static route option (121). VPN-based security solutions that rely on routes to redirect traffic can be forced to leak traffic over the physical interface. An attacker on the same local network can read, disrupt, or possibly modify network traffic that was expected to be protected by the VPN.

Missing Authentication for Critical Function

An Improper Validation of Integrity Check Value in Zscaler Client Connector on Windows

CVE-2023-28802 5.4 - Medium - November 21, 2023

An Improper Validation of Integrity Check Value in Zscaler Client Connector on Windows allows an authenticated user to disable ZIA/ZPA by interrupting the service restart from Zscaler Diagnostics. This issue affects Client Connector: before 4.2.0.149.

Improper Validation of Integrity Check Value

Origin Validation Error vulnerability in Zscaler Client Connector on Linux allows Privilege Abuse

CVE-2023-28794 6.5 - Medium - November 06, 2023

Origin Validation Error vulnerability in Zscaler Client Connector on Linux allows Privilege Abuse. This issue affects Zscaler Client Connector for Linux: before 1.3.1.6.

Origin Validation Error

The Zscaler Client Connector for macOS prior to 3.6 did not sufficiently validate RPC clients

CVE-2021-26737 4.7 - Medium - October 23, 2023

The Zscaler Client Connector for macOS prior to 3.6 did not sufficiently validate RPC clients. A local adversary without sufficient privileges may be able to shutdown the Zscaler tunnel by exploiting a race condition.

Origin Validation Error

Zscaler Client Connector Installer on Windows before version 3.4.0.124 improperly handled directory junctions during uninstallation

CVE-2021-26734 5.5 - Medium - October 23, 2023

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.

The Zscaler Client Connector Installer and Unsintallers for Windows prior to 3.6 had an unquoted search path vulnerability

CVE-2021-26735 7.8 - High - October 23, 2023

The Zscaler Client Connector Installer and Unsintallers for Windows prior to 3.6 had an unquoted search path vulnerability. A local adversary may be able to execute code with SYSTEM privileges.

Unquoted Search Path or Element

Multiple vulnerabilities in the Zscaler Client Connector Installer and Uninstaller for Windows prior to 3.6

CVE-2021-26736 7.8 - High - October 23, 2023

Multiple vulnerabilities in the Zscaler Client Connector Installer and Uninstaller for Windows prior to 3.6 allowed execution of binaries from a low privileged path. A local adversary may be able to execute code with SYSTEM privileges.

Directory traversal

Zscaler Client Connector for macOS prior to 3.7 had an unquoted search path vulnerability via the PATH variable

CVE-2021-26738 7.8 - High - October 23, 2023

Zscaler Client Connector for macOS prior to 3.7 had an unquoted search path vulnerability via the PATH variable. A local adversary may be able to execute code with root privileges.

Untrusted Path

Buffer overflow vulnerability in the signelf library used by Zscaler Client Connector on Linux allows Code Injection

CVE-2023-28793 7.8 - High - October 23, 2023

Buffer overflow vulnerability in the signelf library used by Zscaler Client Connector on Linux allows Code Injection. This issue affects Zscaler Client Connector for Linux: before 1.3.1.6.

Memory Corruption

Origin Validation Error vulnerability in Zscaler Client Connector on Linux allows Inclusion of Code in Existing Process

CVE-2023-28795 7.8 - High - October 23, 2023

Origin Validation Error vulnerability in Zscaler Client Connector on Linux allows Inclusion of Code in Existing Process. This issue affects Zscaler Client Connector for Linux: before 1.3.1.6.

Origin Validation Error

Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on Linux allows Code Injection

CVE-2023-28796 7.8 - High - October 23, 2023

Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on Linux allows Code Injection. This issue affects Zscaler Client Connector for Linux: before 1.3.1.6.

Improper Verification of Cryptographic Signature

Zscaler Client Connector for Windows before 4.1 writes/deletes a configuration file inside specific folders on the disk

CVE-2023-28797 7.3 - High - October 23, 2023

Zscaler Client Connector for Windows before 4.1 writes/deletes a configuration file inside specific folders on the disk. A malicious user can replace the folder and execute code as a privileged user.

insecure temporary file

An authentication bypass by spoofing of a device with a synthetic IP address is possible in Zscaler Client Connector on Windows

CVE-2023-28803 6.5 - Medium - October 23, 2023

An authentication bypass by spoofing of a device with a synthetic IP address is possible in Zscaler Client Connector on Windows, allowing a functionality bypass. This issue affects Client Connector: before 3.9.

Authentication Bypass by Spoofing

An Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on Linux

CVE-2023-28804 5.3 - Medium - October 23, 2023

An Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on Linux allows replacing binaries.This issue affects Linux Client Connector: before 1.4.0.105

Improper Verification of Cryptographic Signature

An Improper Input Validation vulnerability in Zscaler Client Connector on Linux allows Privilege Escalation

CVE-2023-28805 9.8 - Critical - October 23, 2023

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

A URL parameter during login flow was vulnerable to injection

CVE-2023-28799 6.1 - Medium - June 22, 2023

A URL parameter during login flow was vulnerable to injection. An attacker could insert a malicious domain in this parameter, which would redirect the user after auth and send the authorization token to the redirected domain.

Open Redirect

When using local accounts for administration, the redirect url parameter was not encoded correctly

CVE-2023-28800 6.1 - Medium - June 22, 2023

When using local accounts for administration, the redirect url parameter was not encoded correctly, allowing for an XSS attack providing admin login.

XSS

The Zscaler Client Connector for Windows prior to 2.1.2.105 had a DLL hijacking vulnerability caused due to the configuration of OpenSSL

CVE-2020-11634 7.8 - High - July 15, 2021

The Zscaler Client Connector for Windows prior to 2.1.2.105 had a DLL hijacking vulnerability caused due to the configuration of OpenSSL. A local adversary may be able to execute arbitrary code in the SYSTEM context.

DLL preloading

The Zscaler Client Connector prior to 2.1.2.150 did not quote the search path for services, which

CVE-2020-11632 7.8 - High - July 15, 2021

The Zscaler Client Connector prior to 2.1.2.150 did not quote the search path for services, which allows a local adversary to execute code with system privileges.

Unquoted Search Path or Element

The Zscaler Client Connector for Windows prior to 2.1.2.74 had a stack based buffer overflow when connecting to misconfigured TLS servers

CVE-2020-11633 9.8 - Critical - July 15, 2021

The Zscaler Client Connector for Windows prior to 2.1.2.74 had a stack based buffer overflow when connecting to misconfigured TLS servers. An adversary would potentially have been able to execute arbitrary code with system privileges.

Memory Corruption

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