CVE-2026-4556 macOS Exam4 Local Privilege Escalation via Command Injection
A local attacker can execute arbitrary commands with root privileges via command injection in the Exam4 LogTool helper on macOS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4556?
CVE-2026-4556 is a high-severity command injection vulnerability in Extegrity Exam4, published on 28 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Exam4 is affected by a local privilege escalation vulnerability in the com.extegrity.LogTool privileged helper, which communicates with the application via XPC. The [ConsoleLogHelper copyConsoleIntoFileFromStartDate:] method executes a syslog command using attacker-controlled parameters without proper sanitization, enabling command injection. Successful exploitation allows a local attacker to execute arbitrary commands with root privileges through LaunchSynchronous.
Weakness: CWE-78
Which versions are affected by CVE-2026-4556?
How do I fix CVE-2026-4556?
No fix has been published for CVE-2026-4556 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-4556 being exploited?
There is no known exploitation of CVE-2026-4556 in the wild and no public exploit code.
Sources
Also known as GHSA-j6v8-h79v-8cqh.