CVE-2025-59299 is a medium-severity vulnerability identified in Delta Electronics' DIAScreen product. The vulnerability is classified as CWE-787, which corresponds to an out-of-bounds write condition. This occurs due to insufficient validation of user-supplied files. Specifically, when a user opens a maliciously crafted file within DIAScreen, the application fails to properly validate the file content or structure, leading to an out-of-bounds write in memory. This memory corruption can be exploited by an attacker to execute arbitrary code within the context of the current process. The vulnerability does not require privileges or authentication but does require user interaction, as the user must open the malicious file. The CVSS 4.0 base score is 6.8, reflecting a medium severity level. The attack vector is local (AV:L), meaning the attacker must have local access to the system or be able to trick a user into opening the malicious file. The vulnerability impacts confidentiality, integrity, and availability to a limited extent (VC:L, VI:L, VA:H), indicating that while the attacker can execute code, the scope and impact are somewhat constrained. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability was published on October 3, 2025, with the reservation date on September 12, 2025. DIAScreen is a product by Delta Electronics, which is known for industrial automation and HMI (Human Machine Interface) solutions, suggesting that affected systems may be used in industrial or manufacturing environments.

For European organizations, especially those in industrial sectors such as manufacturing, energy, and critical infrastructure, this vulnerability poses a significant risk. DIAScreen is likely deployed in environments where human-machine interfaces control or monitor industrial processes. Successful exploitation could allow attackers to execute arbitrary code, potentially leading to disruption of industrial operations, data manipulation, or sabotage. This could result in operational downtime, safety hazards, and financial losses. Since the attack requires user interaction, social engineering or phishing campaigns targeting employees to open malicious files could be a vector. The medium severity score indicates that while the vulnerability is not trivially exploitable remotely, the consequences of exploitation in industrial contexts could be severe. Confidentiality and integrity impacts are limited but present, which could affect sensitive operational data or control commands. Availability impact is high, meaning disruption of services or processes is a realistic threat. Given the increasing targeting of industrial control systems in Europe by cyber adversaries, this vulnerability represents a tangible risk to European industrial organizations.

1. Implement strict file handling policies within DIAScreen environments, including restricting the types of files that can be opened and scanned for malicious content before opening. 2. Educate users and operators on the risks of opening files from untrusted sources, emphasizing the need for caution with email attachments or external media. 3. Employ network segmentation to isolate DIAScreen systems from general IT networks, limiting exposure to potentially malicious files. 4. Use endpoint protection solutions capable of detecting anomalous behavior or memory corruption attempts related to out-of-bounds writes. 5. Monitor logs and system behavior for signs of exploitation attempts, such as unexpected process crashes or unusual code execution patterns. 6. Coordinate with Delta Electronics for timely patch deployment once available, and consider applying any available workarounds or vendor recommendations in the interim. 7. Conduct regular security assessments and penetration testing focused on industrial control systems to identify and remediate similar vulnerabilities proactively. 8. Implement application whitelisting and restrict execution privileges on systems running DIAScreen to minimize the impact of potential code execution.