CVE-2025-9494
Viessmann Vitogate 300 OS Command Injection
CVE-2025-9494 is a high vulnerability (CVSS 8.5) in Viessmann Vitogate 300, published September 23, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.68%, the 52nd percentile. No source names a fixed version.
- Severity
- 8.5 HighCVSS 4.0, CVE List
- Exploit chance
- 0.68%EPSS, 52nd percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
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.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
What each source reports
CVE List Score used
Viessmann Vitogate 300 OS Command Injection
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.
- Record
CVE-2025-9494- CVSS 4.0
- 8.5 High
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 - Weakness
- CWE-78
- Updated
- 2026-11-02
EUVDEUVD-2025-30434
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.
- Record
EUVD-2025-30434- CVSS 4.0
- 8.5 High
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-75cp-gjjh-3r55
An OS command injection vulnerability has been discovered in the Vitogate 300, which can be...
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.
- Record
GHSA-75cp-gjjh-3r55- CVSS 4.0
- 8.5 High
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-78
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-9494- CVSS 4.0
- 8.5 High
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-78
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.