CVE-2026-25721 Overview
An OS command injection vulnerability exists in Copeland XWEB Pro version 1.12.1 and prior, enabling an authenticated attacker to achieve remote code execution on the system by injecting malicious input into the server username and/or password fields of the restore action in the API V1 route. This vulnerability affects multiple XWEB Pro industrial control system devices used in refrigeration and HVAC monitoring applications.
Critical Impact
Authenticated attackers can execute arbitrary OS commands on affected XWEB Pro devices, potentially compromising industrial control systems and enabling lateral movement within operational technology (OT) networks.
Affected Products
- Copeland XWEB 300D Pro (firmware version 1.12.1 and prior)
- Copeland XWEB 500D Pro (firmware version 1.12.1 and prior)
- Copeland XWEB 500B Pro (firmware version 1.12.1 and prior)
Discovery Timeline
- 2026-02-27 - CVE-2026-25721 published to NVD
- 2026-02-27 - Last updated in NVD database
Technical Details for CVE-2026-25721
Vulnerability Analysis
This vulnerability is classified as CWE-78 (Improper Neutralization of Special Elements used in an OS Command), commonly known as OS command injection. The flaw resides in the restore action functionality within the API V1 route of affected XWEB Pro devices.
The vulnerability allows authenticated users to inject arbitrary operating system commands through the server username and password input fields. When the restore action is triggered, user-supplied input is incorporated into system commands without proper sanitization, allowing command separators and shell metacharacters to break out of the intended command context and execute attacker-controlled commands with the privileges of the web application process.
Given the industrial control system nature of these devices, successful exploitation could impact refrigeration monitoring and control operations, potentially affecting cold chain integrity in commercial and industrial environments.
Root Cause
The root cause of this vulnerability is insufficient input validation and sanitization in the restore action handler. The server username and password parameters are passed to underlying system commands without proper escaping or filtering of shell metacharacters such as semicolons (;), pipes (|), backticks, and command substitution syntax ($()). This allows attackers to terminate the intended command and append arbitrary commands for execution.
Attack Vector
The attack requires network access to the XWEB Pro device's web interface and valid authentication credentials. An attacker with low-privileged authenticated access can craft malicious payloads in the username or password fields when invoking the restore functionality through the API V1 endpoint.
The malicious input containing OS command injection payloads is then processed by the backend, where the unsanitized data is concatenated into shell commands. This results in the execution of attacker-supplied commands with the privileges of the web application, typically running as a service account on the embedded Linux system.
No user interaction beyond initial authentication is required, and the attack can be performed remotely over the network. The vulnerability affects confidentiality, integrity, and availability of the system, as successful exploitation grants full command execution capabilities.
Detection Methods for CVE-2026-25721
Indicators of Compromise
- Unusual process executions originating from the XWEB Pro web application process
- HTTP POST requests to the API V1 restore endpoint containing shell metacharacters in username/password parameters
- Unexpected outbound network connections from XWEB Pro devices
- Modification of system files or creation of new user accounts on the device
Detection Strategies
- Monitor API V1 endpoint requests for suspicious characters in authentication fields, including ;, |, $(), and backticks
- Implement network-based intrusion detection rules to identify command injection patterns in HTTP traffic to XWEB Pro devices
- Review web application logs for restore action invocations with anomalous parameter values
- Deploy behavioral analysis to detect command execution anomalies on OT network segments
Monitoring Recommendations
- Enable detailed logging on XWEB Pro devices and forward logs to a centralized SIEM
- Implement network segmentation and monitor traffic crossing IT/OT boundaries
- Configure alerts for administrative actions on XWEB Pro devices outside of maintenance windows
- Regularly audit user accounts and authentication activity on affected devices
How to Mitigate CVE-2026-25721
Immediate Actions Required
- Update affected XWEB Pro devices to the latest firmware version available from Copeland
- Restrict network access to XWEB Pro devices to authorized personnel only
- Implement network segmentation to isolate OT devices from general network access
- Review and audit user accounts with access to XWEB Pro devices
- Monitor for exploitation attempts using the detection strategies outlined above
Patch Information
Copeland has released a firmware update to address this vulnerability. Administrators should download the latest firmware from the Copeland System Software Update portal. CISA has published an ICS advisory (ICSA-26-057-10) with additional remediation guidance for affected organizations.
Workarounds
- Implement strict network access controls to limit which hosts can communicate with XWEB Pro devices
- Place XWEB Pro devices behind a VPN or jump host to restrict direct network exposure
- Configure firewall rules to permit only necessary traffic to and from affected devices
- Disable or restrict access to the API V1 restore functionality if not operationally required
- Apply web application firewall rules to filter command injection patterns in incoming requests
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
