What’s Vulnerable › Vulnerabilities
CVE-2025-9494: Viessmann Vitogate 300 OS Command Injection
- Severity: high (CVSS 8.5 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-09-23 · updated 2026-10-11
- Weakness: CWE-78
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.
Affected products
- Viessmann Vitogate 300: from 1 before 3.1.0.0 — fixed in 3.1.0.0
How to fix
Upgrade to a fixed version: Viessmann Vitogate 300 3.1.0.0. Check the vendor advisory for mitigations.
References
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