CVE-2025-9494 HIGH

CVE-2025-9494: Viessmann Vitogate 300 OS Command Injection

Vendor Viessmann
Product Vitogate 300
Weakness CWE-78
Published September 23, 2025
Last update September 23, 2025

CVSS base score

8.5/10
Attack vector Adjacent
Attack complexity Low
Privileges required High
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 23, 2025 CVE published
September 23, 2025 Record updated