CVE-2025-59300 is a medium-severity vulnerability classified under CWE-787 (Out-Of-Bounds Write) affecting Delta Electronics' DIAScreen software. The vulnerability arises due to insufficient validation of user-supplied files. Specifically, when a user opens a maliciously crafted file within DIAScreen, the software performs an out-of-bounds write operation, which can corrupt memory and potentially allow an attacker to execute arbitrary code within the context of the current process. This type of vulnerability is critical in environments where DIAScreen is used, as it can lead to unauthorized code execution without requiring prior authentication. The CVSS 4.0 vector indicates that the attack requires local access (AV:L), low attack complexity (AC:L), no privileges (PR:N), but does require user interaction (UI:A). The impact on confidentiality, integrity, and availability is rated as low to high respectively, with the highest impact on availability (VA:H). The vulnerability does not involve scope or security impact changes beyond the vulnerable component. No known exploits are currently reported in the wild, and no patches have been published yet. DIAScreen is typically used in industrial automation and control systems, which are critical infrastructure components, making this vulnerability particularly relevant to organizations operating in industrial sectors.

For European organizations, especially those in manufacturing, industrial automation, and critical infrastructure sectors, this vulnerability poses a significant risk. Exploitation could lead to arbitrary code execution, potentially disrupting industrial processes, causing downtime, or even physical damage depending on the control systems managed by DIAScreen. The requirement for local access and user interaction somewhat limits remote exploitation but does not eliminate risk, as insiders or compromised user accounts could trigger the exploit. The impact on availability is high, meaning that successful exploitation could result in system crashes or denial of service, affecting operational continuity. Confidentiality and integrity impacts are lower but still present, as arbitrary code execution could be leveraged for data manipulation or espionage. Given the strategic importance of industrial control systems in Europe’s manufacturing and energy sectors, this vulnerability could have cascading effects on supply chains and critical services if exploited.

European organizations using DIAScreen should implement the following specific mitigations: 1) Restrict access to DIAScreen software to trusted users only, minimizing the risk of malicious file opening. 2) Implement strict file validation and scanning policies at the network perimeter and endpoint levels to detect and block malicious files before they reach DIAScreen users. 3) Employ application whitelisting and sandboxing techniques to limit the execution context of DIAScreen and contain potential exploits. 4) Monitor user activity and file access logs for unusual behavior indicative of exploitation attempts. 5) Since no patch is currently available, coordinate with Delta Electronics for timely updates and consider deploying compensating controls such as network segmentation to isolate DIAScreen systems from broader enterprise networks. 6) Conduct user training to raise awareness about the risks of opening untrusted files within industrial control software environments. 7) Prepare incident response plans specifically addressing potential exploitation scenarios involving DIAScreen.