CVE-2025-41709 is a critical security vulnerability identified in the Janitza UMG 96RM-E 24V(5222063) power monitoring device. The flaw is categorized under CWE-78, which involves improper neutralization of special elements used in OS commands, commonly known as OS command injection. This vulnerability allows an unauthenticated remote attacker to send specially crafted requests over Modbus-TCP or Modbus-RTU protocols—both widely used industrial communication protocols—to inject arbitrary OS commands on the device. Because the device fails to properly sanitize input before incorporating it into system-level commands, attackers can execute arbitrary commands with the privileges of the device’s operating system. This leads to full read and write access, enabling attackers to manipulate device configurations, disrupt monitoring functions, or pivot to other networked systems. The vulnerability is particularly severe due to the lack of authentication requirements and no need for user interaction, making exploitation straightforward if the device is accessible over the network. The CVSS v3.1 base score of 9.8 reflects the critical nature of this vulnerability, with attack vector being network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). Although no public exploits have been reported yet and no patches are currently available, the risk is significant given the device’s role in industrial and critical infrastructure environments. The vulnerability was reserved in April 2025 and published in March 2026 by CERTVDE, indicating a recent discovery. Organizations relying on Janitza UMG 96RM-E devices should consider immediate protective measures to mitigate potential exploitation.

The impact of CVE-2025-41709 is severe for organizations worldwide, especially those in industrial, energy, and critical infrastructure sectors using Janitza UMG 96RM-E 24V devices. Successful exploitation allows attackers to gain full control over the device, compromising the confidentiality, integrity, and availability of power monitoring data and device configurations. This can lead to falsified monitoring data, disruption of power management, and potential cascading failures in industrial control systems. Attackers could also use the compromised device as a foothold to move laterally within the network, escalating attacks against other critical systems. The lack of authentication and ease of exploitation increase the likelihood of attacks, potentially causing operational downtime, financial losses, and safety hazards. Given the device’s role in monitoring and managing electrical parameters, manipulation could impact energy distribution and industrial processes, posing risks to national infrastructure and public safety.

Until an official patch is released by Janitza, organizations should implement the following specific mitigations: 1) Isolate the UMG 96RM-E devices on dedicated network segments with strict access controls to limit exposure to untrusted networks. 2) Restrict Modbus-TCP and Modbus-RTU protocol access using firewalls or network ACLs, allowing only trusted management stations. 3) Monitor network traffic for anomalous Modbus commands or unexpected OS command execution patterns. 4) Employ intrusion detection/prevention systems (IDS/IPS) tuned for Modbus protocol anomalies. 5) Disable or limit remote management interfaces if not required. 6) Conduct regular audits of device configurations and logs to detect unauthorized changes. 7) Engage with Janitza for updates and apply patches immediately upon availability. 8) Consider compensating controls such as network segmentation and multi-factor authentication on management interfaces where possible. These measures reduce the attack surface and help detect or prevent exploitation in the absence of a patch.