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CVE-2024-31127VulnerabilityPublished

CVE-2024-31127: Zscaler Client Connector · Origin Validation Error

Affects Zscaler Client ConnectorSource CVE Database V5

0

Not known to be exploited · CVSS 7.3 High : upgrade to 4.2.0.241 soon.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
7.3High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 0% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.2.0.241
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Jun 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Upgrade Zscaler Client Connector to 4.2.0.241.

Affected software

ProductAffectedFixed in
Zscaler Client ConnectorAffected
  • =0
  • <4.2.0.241
Fixed in
  • 4.2.0.241

AI-suggested

European organizations should prioritize updating the Zscaler Client Connector on macOS to version 4.2.0.241 or later, where this vulnerability is addressed. If you cannot patch yet, organizations should implement strict endpoint access controls to limit local user privileges and restrict physical and remote access to macOS devices running vulnerable versions. Employing application whitelisting and integrity monitoring can help detect unauthorized library modifications or injections. Additionally, organizations should audit and monitor logs for unusual privilege escalation attempts or suspicious library loading activities. Network segmentation can limit the impact of compromised endpoints. Security teams should also educate users about the risks of local access and enforce strong authentication mechanisms to reduce the likelihood of attackers gaining initial footholds. Finally, maintain up-to-date asset inventories to quickly identify and remediate vulnerable systems.

Description

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.

References

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