CVE-2025-40591 Overview
CVE-2025-40591 is a command injection vulnerability in the Log Viewers tool of the Siemens RUGGEDCOM ROX web interface. The flaw stems from missing server-side input sanitation, allowing an authenticated remote attacker to execute the tail command with root privileges. Successful exploitation discloses the contents of any file on the device filesystem. The vulnerability affects multiple RUGGEDCOM ROX models running firmware versions earlier than V2.16.5. Siemens published advisory SSA-301229 documenting the issue and a fixed firmware release.
Critical Impact
An authenticated remote attacker can read arbitrary files on industrial routing devices by injecting commands executed as root through the web-based log viewer.
Affected Products
- RUGGEDCOM ROX MX5000, MX5000RE, RX5000 (all versions < V2.16.5)
- RUGGEDCOM ROX RX1400, RX1500, RX1501, RX1510, RX1511, RX1512 (all versions < V2.16.5)
- RUGGEDCOM ROX RX1524, RX1536 (all versions < V2.16.5)
Discovery Timeline
- 2025-06-10 - CVE-2025-40591 published to NVD
- 2026-04-15 - Last updated in NVD database
Technical Details for CVE-2025-40591
Vulnerability Analysis
The vulnerability resides in the Log Viewers component of the RUGGEDCOM ROX web management interface. The component accepts user-supplied parameters that are passed to a system shell invocation of the tail utility. Because the application does not sanitize these inputs on the server side, an attacker can append shell metacharacters to alter the executed command. The injected command runs with root privileges, the same context used by the underlying log reader. This permits disclosure of any file on the filesystem, including configuration files, credential stores, and cryptographic key material. The weakness maps to [CWE-602] (Client-Side Enforcement of Server-Side Security).
Root Cause
The web interface enforces input restrictions on the client side but fails to repeat those checks on the server. The backend trusts parameters delivered by the browser and concatenates them into a shell command line. This pattern enables command injection whenever an authenticated user submits crafted parameters directly to the underlying endpoint, bypassing client-side controls.
Attack Vector
Exploitation requires network access to the device web interface and valid credentials. After authentication, the attacker submits a forged request to the log viewer endpoint with shell metacharacters in the targeted parameter. The injected payload executes alongside tail, allowing the attacker to read arbitrary files such as /etc/shadow or device configuration backups. No user interaction is required beyond the initial authentication step. The vulnerability is reachable from any system that can reach the management interface, which in operational technology (OT) environments may include engineering workstations and jump hosts.
No public exploit is currently available for CVE-2025-40591. See the Siemens Security Advisory SSA-301229 for vendor-supplied technical details.
Detection Methods for CVE-2025-40591
Indicators of Compromise
- Unexpected HTTP POST requests to the RUGGEDCOM ROX web interface targeting log viewer endpoints with shell metacharacters such as ;, |, `, or $( in parameters.
- Web server or audit logs showing tail invocations referencing files outside standard log paths, such as /etc/shadow or /etc/passwd.
- Authentication sessions from unusual source IP addresses immediately preceding anomalous log viewer requests.
Detection Strategies
- Inspect web management traffic for parameter values containing shell control characters submitted to ROX log viewer URLs.
- Correlate authenticated web sessions with subsequent process activity referencing sensitive system files.
- Baseline normal log viewer usage frequency per user and alert on bursts of requests from a single session.
Monitoring Recommendations
- Forward RUGGEDCOM ROX web interface and system logs to a centralized SIEM or syslog collector for retention and analysis.
- Monitor authentication events on management interfaces and alert on logins from outside approved management VLANs.
- Track firmware version inventory across the RUGGEDCOM fleet to confirm patch coverage at V2.16.5 or later.
How to Mitigate CVE-2025-40591
Immediate Actions Required
- Upgrade all affected RUGGEDCOM ROX devices to firmware version V2.16.5 or later as published in Siemens advisory SSA-301229.
- Restrict access to the device web management interface to dedicated management networks and trusted administrative hosts.
- Rotate credentials for any account that could authenticate to the web interface during the exposure window.
Patch Information
Siemens has released firmware V2.16.5 for all affected RUGGEDCOM ROX models. Apply the update following Siemens upgrade procedures and validate device functionality after deployment. Refer to the Siemens Security Advisory SSA-301229 for download links and version-specific guidance.
Workarounds
- Limit web interface access using network segmentation, firewall rules, or VPN-only management paths until patching completes.
- Disable or restrict accounts that do not require access to the Log Viewers tool to reduce the authenticated attack surface.
- Follow Siemens operational guidelines for securing industrial devices, including the use of defense-in-depth controls around OT networks.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
