CVE-2026-25111 is an OS command injection vulnerability classified under CWE-78 affecting Copeland XWEB 300D PRO devices running firmware version 1.12.1 and earlier. This vulnerability exists in the restore route of the device’s web interface, where insufficient input sanitization allows an authenticated attacker to inject arbitrary OS commands. The attacker must have high-level privileges (authenticated with elevated rights) to exploit this flaw, but no user interaction beyond authentication is required. The vulnerability enables remote code execution (RCE), allowing the attacker to execute arbitrary commands on the underlying operating system, potentially leading to full system compromise. The CVSS v3.1 base score is 8.0, reflecting high impact on confidentiality, integrity, and availability, with network attack vector, high attack complexity, and requirement for privileges. The vulnerability is particularly critical in industrial and building management contexts where Copeland XWEB 300D PRO devices are used to control HVAC or other systems. No public exploit code or patches are currently available, increasing the urgency for defensive measures. The vulnerability was publicly disclosed on February 27, 2026, and is tracked by ICS-CERT and CVE databases.

The impact of CVE-2026-25111 is significant for organizations using Copeland XWEB 300D PRO devices, especially in industrial control and building management systems. Successful exploitation can lead to remote code execution, allowing attackers to take full control of the device, manipulate system functions, disrupt operations, or pivot to other networked systems. This can result in loss of confidentiality (data exposure), integrity (unauthorized changes to device configurations or control commands), and availability (device or system downtime). Given the device’s role in critical infrastructure environments, exploitation could cause operational disruptions, safety hazards, or financial losses. The requirement for authenticated access limits the attack surface but does not eliminate risk, especially in environments with weak access controls or insider threats. The absence of known exploits in the wild provides a window for mitigation but also means attackers may develop exploits soon after disclosure.

To mitigate CVE-2026-25111, organizations should immediately restrict access to the Copeland XWEB 300D PRO management interface to trusted networks and users only, employing network segmentation and firewall rules. Enforce strong authentication mechanisms, including complex passwords and multi-factor authentication where possible, to reduce the risk of credential compromise. Monitor device logs and network traffic for unusual activity indicative of exploitation attempts, such as unexpected commands or restore route access patterns. Disable or limit the use of the restore functionality if feasible until a patch is available. Engage with Copeland or authorized vendors to obtain firmware updates or patches as soon as they are released. In the interim, consider deploying intrusion detection/prevention systems (IDS/IPS) with signatures targeting command injection patterns. Conduct security awareness training for administrators managing these devices to recognize and respond to potential attacks. Finally, maintain an inventory of affected devices and prioritize remediation based on criticality and exposure.