CVE-2025-15358 identifies a vulnerability in the Delta Electronics DVP-12SE11T programmable logic controller, specifically due to improper input validation categorized under CWE-20. This flaw allows an unauthenticated remote attacker to send crafted network packets that the device fails to properly validate, leading to a denial of service (DoS) condition. The vulnerability does not impact confidentiality or integrity but directly affects availability by causing the device to crash, reboot, or become unresponsive. The CVSS v3.1 base score of 7.5 reflects a high severity, with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The scope remains unchanged (S:U), indicating the impact is limited to the vulnerable component itself. The DVP-12SE11T is widely used in industrial automation for controlling machinery and processes, making availability critical. No patches or mitigations have been officially released at the time of publication, and no exploits have been observed in the wild. However, the nature of the vulnerability means that attackers could disrupt industrial operations remotely, potentially causing production halts or safety risks. The vulnerability was reserved and published on December 30, 2025, by the assigner 'Deltaww'.

For European organizations, especially those in manufacturing, energy, and critical infrastructure sectors, this vulnerability poses a significant risk to operational continuity. The DVP-12SE11T PLCs are integral to process control and automation; a denial of service could halt production lines, disrupt supply chains, and cause financial losses. In safety-critical environments, such as power plants or transportation systems, availability loss could also lead to hazardous conditions. The lack of authentication and user interaction requirements means attackers can exploit this vulnerability remotely and easily if the devices are exposed or accessible within internal networks. This elevates the threat level for organizations with insufficient network segmentation or weak perimeter defenses. Additionally, the absence of known exploits in the wild provides a window for proactive defense, but also means attackers may develop exploits soon after disclosure. European organizations must prioritize identifying affected devices and implementing compensating controls to mitigate potential operational disruptions.

1. Immediately identify and inventory all Delta Electronics DVP-12SE11T devices within the network. 2. Implement strict network segmentation to isolate PLCs from general IT networks and restrict access to trusted management stations only. 3. Deploy firewall rules and intrusion detection/prevention systems (IDS/IPS) to monitor and block suspicious traffic targeting the PLCs, especially malformed packets that could trigger the DoS. 4. Limit remote access to the devices using VPNs with strong authentication and restrict access to known IP addresses. 5. Monitor device logs and network traffic for anomalies indicating attempted exploitation. 6. Engage with Delta Electronics for official patches or firmware updates and apply them promptly once available. 7. Conduct regular security assessments and penetration testing focused on industrial control systems to detect similar vulnerabilities. 8. Train operational technology (OT) personnel on recognizing and responding to DoS incidents affecting PLCs. 9. Develop and test incident response plans specific to industrial control system disruptions. 10. Consider deploying redundant or failover PLCs to maintain availability during an attack.