CVE-2026-24452: Copeland Xweb 300d Pro Firmware RCE Flaw

CVE-2026-24452 Overview

An OS command injection vulnerability exists in Copeland XWEB Pro version 1.12.1 and prior versions. This vulnerability enables an authenticated attacker to achieve remote code execution on the system by supplying a crafted template file to the devices route. The flaw is classified under CWE-78 (Improper Neutralization of Special Elements used in an OS Command), indicating that user-supplied input is improperly sanitized before being passed to system command execution functions.

Critical Impact

Authenticated attackers can achieve full remote code execution on affected XWEB Pro industrial control devices, potentially compromising operational technology (OT) environments and critical infrastructure systems.

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-2026-24452 published to NVD
• 2026-02-27 - Last updated in NVD database

Technical Details for CVE-2026-24452

Vulnerability Analysis

This OS command injection vulnerability affects Copeland's XWEB Pro series of industrial control system devices. The vulnerability resides in the devices route functionality where template files are processed. When an authenticated user supplies a specially crafted template file, the application fails to properly sanitize the input before incorporating it into OS-level commands. This allows an attacker to inject arbitrary commands that execute with the privileges of the web application process.

The attack requires authentication, meaning an attacker must first obtain valid credentials to the XWEB Pro interface. However, once authenticated, exploitation is straightforward and does not require user interaction. Given that these devices are industrial control systems often deployed in operational technology environments, successful exploitation could lead to compromise of connected industrial processes, lateral movement within OT networks, and potential disruption of critical infrastructure operations.

Root Cause

The root cause is improper neutralization of special elements used in an OS command (CWE-78). The application's devices route accepts template files from authenticated users and processes them without adequate validation or sanitization. User-controllable input from these template files is concatenated or interpolated directly into system commands, allowing attackers to break out of the intended command context and inject their own malicious commands.

Attack Vector

The attack vector is network-based, requiring the attacker to have authenticated access to the XWEB Pro web interface. The attacker crafts a malicious template file containing OS command injection payloads and uploads it through the devices route endpoint. The injected commands execute on the underlying operating system with the privileges of the web server process.

A typical exploitation scenario involves an attacker embedding shell metacharacters and commands within template file fields that are later processed by the system. Common injection techniques include command separators (;, &&, ||), command substitution ($(command) or backticks), and pipe operators to chain malicious commands with legitimate ones.

Detection Methods for CVE-2026-24452

Indicators of Compromise

• Unusual process spawning from the XWEB Pro web server process, particularly shell interpreters (/bin/sh, /bin/bash) or system utilities (wget, curl, nc)
• Anomalous network connections originating from XWEB Pro devices to external IP addresses
• Unexpected file modifications or new files appearing in system directories on XWEB Pro devices
• Authentication logs showing access patterns followed by suspicious device route API calls

Detection Strategies

• Monitor web server access logs for requests to the devices route endpoint with unusually large payloads or suspicious content patterns
• Implement network intrusion detection rules to identify command injection patterns in HTTP traffic destined for XWEB Pro devices
• Deploy file integrity monitoring on XWEB Pro devices to detect unauthorized system changes
• Configure alerts for process execution anomalies on the embedded Linux system running XWEB Pro firmware

Monitoring Recommendations

• Establish baseline behavior for XWEB Pro device network communications and alert on deviations
• Implement centralized log collection from all XWEB Pro devices for security monitoring
• Monitor for privilege escalation attempts following successful authentication to XWEB Pro interfaces
• Review authentication logs regularly for brute force attempts or credential stuffing targeting XWEB Pro devices

How to Mitigate CVE-2026-24452

Immediate Actions Required

• Apply the latest firmware update from Copeland immediately using the Copeland System Software Update portal
• Restrict network access to XWEB Pro devices to authorized management networks only
• Review and audit all user accounts with access to XWEB Pro devices, removing unnecessary accounts and enforcing strong passwords
• Place XWEB Pro devices behind a firewall and disable direct internet access

Patch Information

Copeland has released a security update to address this vulnerability. Administrators should visit the Copeland System Software Update portal to download and apply the latest firmware version for affected XWEB 300D Pro, XWEB 500D Pro, and XWEB 500B Pro devices. For detailed technical information about this vulnerability, refer to CISA ICS Advisory ICSA-26-057-10.

Workarounds

• Implement network segmentation to isolate XWEB Pro devices from general IT networks and untrusted network segments
• Deploy a web application firewall (WAF) in front of XWEB Pro devices configured to block command injection patterns
• Enable multi-factor authentication if supported, or implement VPN requirements for administrative access
• Disable or restrict access to the devices route functionality if it is not operationally required

# Example: Network isolation using iptables on network gateway
# Restrict access to XWEB Pro devices (example IP: 192.168.10.100) to management VLAN only
iptables -A FORWARD -s 192.168.1.0/24 -d 192.168.10.100 -j DROP
iptables -A FORWARD -s 10.0.0.0/24 -d 192.168.10.100 -p tcp --dport 80 -j ACCEPT
iptables -A FORWARD -s 10.0.0.0/24 -d 192.168.10.100 -p tcp --dport 443 -j ACCEPT