CVE-2025-57704 is a medium severity vulnerability identified in Delta Electronics' EIP Builder software, specifically version 1.11. The vulnerability is classified under CWE-611, which pertains to Improper Restriction of XML External Entity (XXE) Reference. This vulnerability arises due to the software's improper handling of XML input, allowing an attacker to craft malicious XML data containing external entity references. When the vulnerable EIP Builder parses this XML, it processes these external entities, potentially leading to unauthorized disclosure of sensitive information from the file system or other internal resources. The CVSS v3.1 base score is 5.5, reflecting a medium severity level. The vector string (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N) indicates that the attack requires local access (AV:L), low attack complexity (AC:L), no privileges (PR:N), but does require user interaction (UI:R). The impact is primarily on confidentiality (C:H), with no impact on integrity or availability. No known exploits are currently reported in the wild, and no patches have been published at the time of this analysis. The vulnerability could be exploited by tricking a user into opening a malicious XML file within the EIP Builder, leading to information disclosure. Given the nature of the vulnerability, it is critical for organizations using this software to be aware and take proactive measures.

For European organizations utilizing Delta Electronics' EIP Builder, particularly in industrial automation, manufacturing, or energy sectors, this vulnerability poses a risk of sensitive information leakage. The disclosed information could include internal configuration files, credentials, or other proprietary data, which could be leveraged for further attacks or industrial espionage. Since the vulnerability requires local access and user interaction, the risk is higher in environments where users might open untrusted XML files, such as through phishing or social engineering. The confidentiality breach could undermine operational security and intellectual property protection. Additionally, in critical infrastructure sectors, such information disclosure could aid adversaries in planning more damaging attacks. The medium severity rating suggests that while the vulnerability is not immediately critical, it should not be ignored, especially in high-value or sensitive environments prevalent in Europe.

1. Immediate mitigation involves educating users to avoid opening XML files from untrusted or unknown sources within the EIP Builder environment. 2. Implement strict file handling policies and scanning of XML files for malicious content before processing. 3. Employ network segmentation and access controls to limit local access to systems running EIP Builder, reducing the attack surface. 4. Monitor user activity and file access logs to detect suspicious behavior related to XML file handling. 5. Since no patch is currently available, consider deploying application whitelisting or sandboxing techniques to restrict the execution environment of EIP Builder. 6. Engage with Delta Electronics for updates and patches, and plan for timely application once released. 7. Review and harden XML parser configurations if customizable, disabling external entity processing where possible. 8. Incorporate this vulnerability into the organization's vulnerability management program and conduct regular security assessments focusing on XML processing components.