CVE-2025-9494 Viessmann Vitogate 300 OS Command Injection
An authenticated attacker can inject arbitrary OS commands via the Vitogate 300 web interface to gain code execution on the device.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-9494?
CVE-2025-9494 is a high-severity command injection vulnerability in Viessmann Vitogate 300, published on 23 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An OS command injection vulnerability has been discovered in the Vitogate 300, which can be exploited by malicious users to compromise affected installations. Specifically, the `/cgi-bin/vitogate.cgi` endpoint is affected, when the `form` JSON parameter is set to `form-0-2`. The vulnerability stems from the fact that that function at offset 0x21c24 does not properly sanitize supplied input before interpolating it into a format string which gets passed to `popen()`. Consequently, an authenticated attacker is able to inject arbitrary OS commands and thus gain code execution on affected devices.
Weakness: CWE-78
Which versions are affected by CVE-2025-9494?
How do I fix CVE-2025-9494?
No fix has been published for CVE-2025-9494 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-2025-9494 being exploited?
There is no known exploitation of CVE-2025-9494 in the wild and no public exploit code.
Sources
Also known as GHSA-75cp-gjjh-3r55.