CVE-2021-26738 Privilege Escalation for ZCC macOS via PATH Variable

What is CVE-2021-26738?

CVE-2021-26738 is a high-severity vulnerability in Zscaler Client Connector, published on 23 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-426

Which versions are affected by CVE-2021-26738?

It affects 1 product.

Products include Zscaler Client Connector.

How do I fix CVE-2021-26738?

No fix has been published for CVE-2021-26738 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-26738 being exploited?

There is no known exploitation of CVE-2021-26738 in the wild and no public exploit code.

Other vulnerabilities in Zscaler Client Connector

• CVE-2020-11633 Memory corruption in n/a Critical 9.8
• CVE-2024-23463 Anti-Tampering bypass via Repair App functionality High 8.8
• CVE-2023-28804 Linux ZCC allows unsigned updates, allowing elevated Code Execution High 8.2
• CVE-2023-28799 Open redirect in Client Connector High 8.2
• CVE-2023-28800 Output encoding missing in redrurl parameter High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-cr8h-8gv8-gxxv.