CVE-2026-25037: Copeland Xweb 300d Pro RCE Vulnerability

CVE-2026-25037 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 configuring a maliciously crafted LCD state which is later processed during system setup. This vulnerability affects industrial control system (ICS) devices used in refrigeration and HVAC monitoring environments, posing significant risks to operational technology (OT) infrastructure.

Critical Impact

Authenticated attackers can execute arbitrary OS commands on vulnerable Copeland XWEB Pro devices, potentially compromising industrial control systems and enabling lateral movement within 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-2026-25037 published to NVD
• 2026-02-27 - Last updated in NVD database

Technical Details for CVE-2026-25037

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 exists within the LCD state configuration functionality of the XWEB Pro firmware. When an authenticated user configures the LCD state parameter, the input is passed to system-level commands without proper sanitization or validation. During the system setup phase, this maliciously crafted input is processed, allowing the injected OS commands to execute with the privileges of the underlying system process.

The vulnerability requires authentication to exploit, which provides some barrier to entry. However, once an attacker has valid credentials—whether through credential theft, default credentials, or social engineering—they can leverage this flaw to gain complete control over the affected device. Given that these devices operate within industrial control system environments, successful exploitation could have cascading effects on connected HVAC and refrigeration monitoring systems.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and sanitization within the LCD state configuration handler. The firmware fails to properly neutralize shell metacharacters and command separators (such as ;, |, &, and backticks) before incorporating user-supplied input into OS command execution contexts. This allows attackers to break out of the intended command structure and inject arbitrary commands that the system will execute.

Attack Vector

The attack is network-accessible and requires low privileges (authentication) to exploit. An attacker would first authenticate to the XWEB Pro web interface, then navigate to the LCD configuration settings. By inserting shell metacharacters and malicious commands into the LCD state parameter, the attacker can inject arbitrary OS commands. These commands are not executed immediately but are processed during system setup operations, at which point the injected payload executes with system privileges.

The exploitation process involves crafting input that escapes the normal parameter parsing and injects additional commands. For example, an attacker might append shell command separators followed by malicious commands to the LCD state value. When the system setup routine processes this configuration, it inadvertently executes the injected commands.

For detailed technical information, refer to the CISA ICS Advisory and the GitHub CSAF File.

Detection Methods for CVE-2026-25037

Indicators of Compromise

• Unusual or unexpected shell processes spawned by the XWEB Pro web application process
• LCD state configuration values containing shell metacharacters such as ;, |, &, $(), or backticks
• Unexpected network connections originating from XWEB Pro devices to external IP addresses
• Modified system files or unexpected processes running on XWEB Pro devices

Detection Strategies

• Monitor authentication logs for the XWEB Pro web interface for unauthorized access attempts or successful logins from unusual IP addresses
• Implement network traffic analysis to detect anomalous outbound connections from ICS devices
• Review configuration change logs for suspicious modifications to LCD state parameters
• Deploy file integrity monitoring on XWEB Pro devices to detect unauthorized system modifications

Monitoring Recommendations

• Establish baseline network behavior for XWEB Pro devices and alert on deviations
• Integrate XWEB Pro device logs into a centralized SIEM solution for correlation and analysis
• Configure alerts for configuration changes made outside of scheduled maintenance windows
• Monitor for process execution anomalies on the embedded Linux system underlying the XWEB Pro firmware

How to Mitigate CVE-2026-25037

Immediate Actions Required

• Update affected XWEB Pro devices to the latest firmware version available from Copeland
• Restrict network access to XWEB Pro devices using firewalls and network segmentation
• Review and audit all user accounts on affected devices, removing unnecessary accounts and enforcing strong passwords
• Implement multi-factor authentication where supported or use VPN access to restrict administrative interfaces

Patch Information

Copeland has released a firmware update to address this vulnerability. Administrators should download and apply the latest firmware from the Copeland Software Update Portal. Before applying updates, ensure you have proper backups of device configurations and follow Copeland's recommended update procedures for ICS environments.

Additional guidance is available in the CISA ICS Advisory ICSA-26-057-10.

Workarounds

• Isolate affected XWEB Pro devices on a dedicated network segment with strict firewall rules limiting access to authorized management stations only
• Disable remote access to the XWEB Pro web interface if not operationally required
• Implement application-layer firewalls or web application firewalls (WAF) to filter malicious input patterns targeting the LCD state parameter
• Monitor and audit all administrative access to the devices until patches can be applied

# Example: Network segmentation using iptables to restrict access to XWEB Pro device
# Allow only specific management workstation (192.168.10.50) to access the device
iptables -A INPUT -s 192.168.10.50 -p tcp --dport 80 -j ACCEPT
iptables -A INPUT -s 192.168.10.50 -p tcp --dport 443 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP