CVE-2025-43876 Command injection in iSTAR Ultra G2, iSTAR Ultra G2 SE, iSTAR Edge G2
Authenticated attackers can execute arbitrary commands on Johnson Controls iSTAR access control devices via the get8021xSettings endpoint.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-43876?
CVE-2025-43876 is a high-severity command injection vulnerability in Johnson Controls iSTAR Ultra G2, iSTAR Ultra G2 SE, iSTAR Edge G2, published on 24 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Under certain circumstances a successful exploitation could result in access to the device.
Weakness: CWE-78
Which versions are affected by CVE-2025-43876?
How do I fix CVE-2025-43876?
No fix has been published for CVE-2025-43876 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-2025-43876 being exploited?
There is no known exploitation of CVE-2025-43876 in the wild and no public exploit code.
Sources
Also known as GHSA-3vrr-x6c8-rfm2.