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Vulnerabilities

Vulnerability · CVE-2025-9494

An OS command injection vulnerability has been discovered in the Vitogate 300, which can be exploited by malicious users to compromise affected installations.

Published Sep 23, 2025 · catalog updated Sep 23, 2025 · Viessmann Vitogate 300

Last checked Oct 26, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-9494. EPSS is 0.68%. Act only if a listed version of Viessmann Vitogate 300 is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.68%
Remediation
Version ranges on file
Affected products
vendor Viessmann Vitogate 300 1 <3.1.0.0

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 endpoint is affected, when the JSON parameter is set to . 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 . Consequently, an authenticated attacker is able to inject arbitrary OS commands and thus gain code execution on affected devices.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Viessmann Vitogate 300 1 <3.1.0.01 <3.1.0.0

How to fix CVE-2025-9494

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-9494. EPSS is 0.68%. Act only if a listed version of Viessmann Vitogate 300 is installed.

Which versions are affected?

Compare what you have installed with Viessmann Vitogate 300 1 <3.1.0.0 1 <3.1.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.68%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 23, 2025 · EUVD

    Detected

    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 endpoint is affected, when the JSON parameter is set to . 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 whi

  2. Sep 23, 2025 · EUVD

    Updated

    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 endpoint is affected, when the JSON parameter is set to . 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 whi

Sources

  • CVE.orgVulnerability recordCVE-2025-9494

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-9494

    30-day exploitation probability 0.68%

    first.org
  • EUVDVulnerability recordEUVD-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 endpoint is affected, when the JSON parameter is set to . The vulnerability stems from the fact that th

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 26, 2026
  • CVE.orgOct 23, 2026
  • EUVDOct 23, 2026