CVE-2025-4008
Smartbedded Meteobridge Command Injection Vulnerability
Description
CVE-2025-4008 is a high-severity command injection vulnerability in the Smartbedded Meteobridge web interface, a system used to manage weather station data collection. The vulnerability, combined with missing authentication on a critical endpoint, allows remote unauthenticated attackers on the adjacent network to execute arbitrary commands with root privileges on affected devices. With a CVSS v3.1 base score of 8.8, Meteobridge firmware and VM versions prior to 6.2 are vulnerable. CISA has added CVE-2025-4008 to the Known Exploited Vulnerabilities catalog, and its EPSS score of 43.15% at the 97th percentile indicates very high exploitation probability.
KEV Information
CVSS Score
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HOpen in CalculatorCWEs
Affected Products
| Vendor | Product | Version |
|---|---|---|
| smartbedded | meteobridge vm | < 6.2 |
| smartbedded | meteobridge firmware | < 6.2 |
References
- https://forum.meteohub.de/viewtopic.php?t=18687(Vendor Advisory)
- https://www.onekey.com/resource/security-advisory-remote-command-execution-on-smartbedded-meteobridge-cve-2025-4008(Exploit, Third Party Advisory)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-4008(US Government Resource)
Weakness Type
CWE-77: Command Injection
CVE-2025-4008 involves CWE-77 (Improper Neutralization of Special Elements used in a Command), commonly known as command injection. The Meteobridge web interface, which is implemented using CGI shell scripts and C programs, incorporates user-supplied input into system commands without proper sanitization. An attacker can inject shell metacharacters into request parameters, causing the underlying system to execute arbitrary commands with root privileges.
Learn more: CWE-77 — Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-306: Missing Authentication for Critical Function
CVE-2025-4008 also involves CWE-306 (Missing Authentication for Critical Function). The vulnerable endpoint in the Meteobridge web interface does not require any authentication, allowing unauthenticated attackers to directly access the command injection vector without needing valid credentials.
Learn more: CWE-306 — Missing Authentication for Critical Function
Impact Analysis
CVE-2025-4008 poses a serious risk to Meteobridge device deployments. The vulnerability is exploitable from an adjacent network (AV:A) with low attack complexity (AC:L), requiring no authentication (PR:N) and no user interaction (UI:N). Confidentiality (High): Root-level command execution grants the attacker access to all data on the device, including weather station configurations, network credentials, and any data collected by the weather monitoring system. Integrity (High): With root access, an attacker can modify device configurations, alter collected weather data, install persistent backdoors, and use the compromised device as a pivot point for attacks against other devices on the local network. Availability (High): The attacker can disrupt weather data collection operations, brick the device, or use it for denial-of-service attacks. Although the attack vector is limited to adjacent networks (not the wider internet), many IoT devices including weather stations are deployed on networks with insufficient segmentation. The CVSS score of 8.8 (High) and EPSS score of 43.15% at the 97th percentile confirm that the Meteobridge command injection vulnerability is actively targeted.
Exploit Maturity
CVE-2025-4008 demonstrates high exploit maturity. A detailed security advisory with exploit information is publicly available from ONEKEY, which includes technical details about the vulnerability and its exploitation. CISA has confirmed active exploitation by adding this vulnerability to the Known Exploited Vulnerabilities catalog. The EPSS score of 43.15% at the 97th percentile places it in the top 3% of all vulnerabilities by exploitation probability, indicating widespread targeting of Meteobridge devices. The combination of command injection with missing authentication means exploitation requires no credentials — an attacker only needs network adjacency to the target device, making it particularly attractive for attackers who have gained initial access to a local network through other means.
Remediation
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Upgrade Meteobridge firmware to version 6.2 or later immediately. Both Meteobridge firmware and Meteobridge VM versions prior to 6.2 are affected. The vendor has released version 6.2 with a fix, as documented in the Meteobridge forum. The CISA required action states to apply mitigations per vendor instructions or discontinue use of the product.
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Isolate Meteobridge devices on a dedicated IoT VLAN with strict network segmentation. The attack vector is adjacent network (AV:A), so proper network segmentation significantly reduces the attack surface. Implement firewall rules that restrict access to the Meteobridge web interface to only authorized management stations.
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Disable or restrict the web interface if it is not actively needed for device management. Given that the vulnerability is in the CGI-based web interface, disabling web access when not in use eliminates the attack vector entirely. If web access is needed, implement IP-based access controls at the network level.
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Monitor network traffic to and from Meteobridge devices for anomalous activity. Look for unexpected outbound connections, unusual command execution patterns, and signs of lateral movement from the device. IoT devices with root-level compromise can be used as persistent footholds within the network.
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Audit all IoT devices on the network for similar vulnerabilities. CGI-based web interfaces on embedded devices frequently contain command injection flaws. Implement a regular firmware update process for all IoT devices and maintain an inventory to ensure timely patching.
Technical Details
CVE-2025-4008 is a command injection vulnerability in the Smartbedded Meteobridge web interface, compounded by missing authentication. The CVSS v3.1 vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates exploitation from an adjacent network with no complexity, no authentication, and no user interaction, achieving maximum CIA impact. The Meteobridge web interface is implemented using CGI shell scripts and C programs. A specific endpoint exposed by the web server accepts user input that is directly incorporated into system shell commands without proper sanitization or escaping of shell metacharacters. This constitutes CWE-77 (Command Injection). Additionally, this endpoint lacks any authentication mechanism (CWE-306), meaning any device on the same network segment can access it. Because the web server and CGI scripts run with root privileges, injected commands execute as root, providing the attacker with complete control over the device. The combination of these two weaknesses — missing authentication and command injection — creates a particularly dangerous attack chain where no barriers exist between an adjacent network attacker and root-level command execution.
Frequently Asked Questions
Is CVE-2025-4008 being actively exploited?
Yes. CISA has confirmed active exploitation by adding CVE-2025-4008 to the Known Exploited Vulnerabilities catalog. The EPSS score of 43.15% at the 97th percentile indicates very high exploitation probability. ONEKEY has published a detailed security advisory with exploit information.
What products are affected by CVE-2025-4008?
Smartbedded Meteobridge VM and Meteobridge firmware versions prior to 6.2 are affected. The vulnerability is in the CGI-based web interface used for weather station management and device administration. Both the command injection and missing authentication flaws must be addressed.
How do I fix CVE-2025-4008?
Upgrade to Meteobridge firmware version 6.2 or later. As an interim mitigation, isolate Meteobridge devices on a dedicated network segment and restrict access to the web interface to trusted management stations only.
How severe is CVE-2025-4008?
CVE-2025-4008 is rated High with a CVSS v3.1 base score of 8.8. The vulnerability allows unauthenticated command execution with root privileges from an adjacent network. Its EPSS score of 43.15% at the 97th percentile places it in the top 3% of exploited vulnerabilities, confirming active targeting of Meteobridge devices.
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