CVE-2025-9494

Authenticated command execution via unsanitized JSON input

Published Sep 23, 2025 · Updated Sep 23, 2025

OS command injection in Viessmann Vitogate 300 before 3.1.0.1 allows remote authenticated users to execute arbitrary commands. At /cgi-bin/vitogate.cgi, form-0-2 processing interpolates an unsanitized JSON string into a format string passed to popen(). Exploitation requires high-privileged, adjacent-network access and grants command execution in the device context.

CVSS severity8.5
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Viessmann Vitogate 300 before 3.1.0.1 allows remote authenticated users to execute arbitrary commands. At /cgi-bin/vitogate.cgi, form-0-2 processing interpolates an unsanitized JSON string into a format string passed to popen(). Exploitation requires high-privileged, adjacent-network access and grants command execution in the device context.

The record

CVE
CVE-2025-9494
Published
Sep 23, 2025
Updated
Sep 23, 2025
Vendor
Viessmann
Product
Vitogate 300
Classifications
CWE-78, T1059
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Sep 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1 <3.1.0.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

Viessmann · Vitogate 300version=1 <3.1.0.0

Published CVSS scores

8.5Carrier Global CorporationCVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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