How to fix CVE-2024-31127?

Within 24 hours: Identify all macOS devices running Zscaler Client Connector versions prior to 4.2.0.241 using your endpoint management system. Within 7 days: Deploy Zscaler Client Connector version 4.2.0.241 or later to all affected macOS endpoints via your standard patch management workflow. Within 30 days: Verify deployment completion across 100% of the macOS fleet and confirm no systems remain on vulnerable versions through compliance scanning.

Is Zscaler Client Connector affected by CVE-2024-31127?

Zscaler Client Connector for macOS contains a privilege escalation vulnerability (CVE-2024-31127) that allows local users to gain system-level access without authentication, potentially compromising endpoint security and sensitive data on affected employee devices.

Zscaler Client Connector CVE-2024-31127

EUVD-2024-29038 HIGH

Origin Validation Error (CWE-346)

2025-06-04 [email protected]

Information Disclosure

7.3

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

Low

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 06:45 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

4.2.0.241

Analysis Generated

Mar 14, 2026 - 17:29 vuln.today

EUVD ID Assigned

Mar 14, 2026 - 17:29 euvd

EUVD-2024-29038

CVE Published

Jun 04, 2025 - 05:15 nvd

HIGH 7.3

DescriptionNVD

An improper verification of a loaded library in Zscaler Client Connector on Mac < 4.2.0.241 may allow a local attacker to elevate their privileges.

AnalysisAI

Privilege escalation vulnerability in Zscaler Client Connector for macOS versions prior to 4.2.0.241, caused by improper verification of loaded libraries. A local attacker with standard user privileges can exploit this weakness without user interaction to gain elevated system privileges, potentially compromising system integrity and confidentiality. The CVSS 7.3 score reflects the moderate-to-high severity of local privilege escalation with high impact on confidentiality and integrity.

Technical ContextAI

This vulnerability exists in the Zscaler Client Connector (CPE: cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:macos:*:*), specifically affecting macOS versions below 4.2.0.241. The root cause is classified under CWE-346 (Origin Validation Error), indicating that the application fails to properly validate or verify the authenticity and source of dynamically loaded libraries. On macOS, this typically manifests as insufficient checks on library search paths, code signing verification, or runtime library loading mechanisms. An attacker could exploit this by placing a malicious library in a location where the application searches for dependencies (such as DYLD_LIBRARY_PATH manipulation or writable shared library directories), allowing arbitrary code execution with the privileges of the vulnerable process.

RemediationAI

Patching: Upgrade Zscaler Client Connector to version 4.2.0.241 or later on all affected macOS systems; priority: Critical Verification: Verify Client Connector version via system settings or 'about' menu; confirm automatic updates are enabled to prevent regression Interim Mitigation: Restrict local user account privileges on macOS systems running vulnerable versions; disable DYLD_* environment variables that could be exploited for library injection Monitoring: Monitor process execution and library loading patterns for suspicious .dylib loading from non-standard locations; review audit logs for privilege escalation attempts

CVE-2024-31127 vulnerability details – vuln.today

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