CVE-2025-57392 identifies a security vulnerability in BenimPOS Masaustu version 3.0.x related to insecure file permissions on the application installation directory. Specifically, the directory permissions grant the 'Everyone' and 'BUILTIN\Users' groups FILE_ALL_ACCESS rights. This means that any local user on the system can read, write, modify, or delete files within the installation directory, including executable (.exe) and dynamic link library (.dll) files. Such overly permissive access allows a local attacker to replace or tamper with these critical application files. When the application is subsequently launched by another user or in an elevated context (e.g., with administrative privileges), the maliciously altered executables or libraries can be executed, resulting in privilege escalation or arbitrary code execution. This vulnerability is particularly dangerous because it does not require remote access or complex exploitation techniques; any local user with standard privileges can exploit it simply by modifying files in the installation directory. The lack of a CVSS score suggests this is a newly published vulnerability (as of September 10, 2025) and may not yet have an official severity rating. No patches or mitigations are currently linked, and there are no known exploits in the wild at this time. The vulnerability arises from improper configuration of file system permissions, a common but critical security oversight that can lead to significant compromise of system integrity and confidentiality.

For European organizations using BenimPOS Masaustu 3.0.x, this vulnerability poses a significant risk. The ability for any local user to escalate privileges or execute arbitrary code can lead to full system compromise, data theft, or disruption of point-of-sale operations. Given that POS systems often handle sensitive payment card data and personally identifiable information (PII), exploitation could result in financial fraud, regulatory non-compliance (e.g., GDPR violations), and reputational damage. Additionally, compromised POS systems can serve as footholds for lateral movement within corporate networks, increasing the risk of broader enterprise breaches. The impact is heightened in environments where multiple users share access to POS terminals or where endpoint security controls are weak. Since exploitation requires local access, insider threats or attackers who gain initial footholds through other means could leverage this vulnerability to escalate privileges and deepen their control. The lack of patches means organizations must rely on compensating controls until a fix is available, increasing operational risk. Overall, the vulnerability threatens confidentiality, integrity, and availability of critical retail and financial systems in European markets.

To mitigate this vulnerability, European organizations should immediately audit and restrict file system permissions on the BenimPOS Masaustu installation directories. Specifically, remove FILE_ALL_ACCESS rights from the 'Everyone' and 'BUILTIN\Users' groups and restrict write and modify permissions to only trusted administrative accounts. Implement the principle of least privilege for all users on POS systems. Employ application whitelisting and integrity monitoring tools to detect unauthorized changes to executables and DLLs. Where possible, isolate POS systems on segmented networks with strict access controls to limit local user access. Conduct regular security awareness training to reduce insider threat risks. Until an official patch is released, consider deploying endpoint detection and response (EDR) solutions to monitor for suspicious file modifications or process executions. Additionally, enforce strong physical security controls to prevent unauthorized local access to POS terminals. Finally, maintain up-to-date backups of critical application files to enable rapid recovery if tampering occurs.