CVE-2024-31127Public exploit

Root code execution via dynamic-library validation bypass

Published Jun 4, 2025 · Updated Jun 4, 2025

Local privilege escalation in Zscaler Client Connector for Mac before 4.2.0.241 allows local users to execute code as root. ZscalerTunnel permits untrusted dynamic-library loading, allowing injected code with Zscaler's team identifier to call the privileged ZscalerService NSXPC installRevertZCC method with an attacker-controlled path. A low-privileged macOS account can place an installbuilder.sh script beneath that path, which the service passes to /bin/sh as root without user interaction.

CVSS severity7.3
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local privilege escalation in Zscaler Client Connector for Mac before 4.2.0.241 allows local users to execute code as root. ZscalerTunnel permits untrusted dynamic-library loading, allowing injected code with Zscaler's team identifier to call the privileged ZscalerService NSXPC installRevertZCC method with an attacker-controlled path. A low-privileged macOS account can place an installbuilder.sh script beneath that path, which the service passes to /bin/sh as root without user interaction.

The record

CVE
CVE-2024-31127
Published
Jun 4, 2025
Updated
Jun 4, 2025
Vendor
Zscaler
Product
Zscaler Client Connector
Classifications
CWE-346, T1574.006
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.2.0.241

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Zscaler · Zscaler Client Connectorversion=0 <4.2.0.241

Published CVSS scores

7.3Zscaler, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-346Origin Validation Error
T1574.006Hijack Execution Flow: Dynamic Linker Hijacking

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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