CVE-2025-39202 in MicroSCADA X SYS600
Summary
by MITRE • 06/24/2025
A vulnerability exists in in the Monitor Pro interface of the MicroSCADA X SYS600 product. An authenticated user with low privileges can see and overwrite files causing information leak and data corruption.
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Analysis
by VulDB Data Team • 01/27/2026
The vulnerability identified as CVE-2025-39202 represents a critical security flaw within the MicroSCADA X SYS600 product's Monitor Pro interface that exposes organizations to significant operational risks. This issue affects the industrial control systems environment where the SYS600 platform serves as a monitoring solution for critical infrastructure operations. The vulnerability stems from inadequate access controls and file handling mechanisms that permit authenticated users with minimal privileges to access and manipulate sensitive system files. Such a weakness fundamentally undermines the security posture of industrial environments where data integrity and confidentiality are paramount for operational continuity and safety.
The technical implementation of this vulnerability manifests through insufficient authorization checks within the Monitor Pro interface components. An attacker with low privilege credentials can exploit this flaw to perform unauthorized file operations including both reading and writing activities. This capability directly violates the principle of least privilege and demonstrates a clear breakdown in the access control mechanisms designed to protect sensitive operational data. The vulnerability's impact extends beyond simple information disclosure as it enables data corruption through overwrite operations, potentially leading to system instability, operational disruptions, and compromise of critical control processes. The flaw operates at the application layer and requires authentication, making it accessible to both internal users with limited access rights and potentially external attackers who have obtained such credentials through social engineering or other means.
The operational implications of this vulnerability are severe for organizations relying on MicroSCADA X SYS600 for industrial process monitoring and control. Information leakage through unauthorized file access can expose proprietary operational data, process parameters, and system configurations that adversaries could leverage for further attacks. Data corruption resulting from overwrite operations poses direct threats to operational integrity, potentially causing system malfunctions, incorrect process control decisions, or complete system failures. This vulnerability particularly impacts the availability and integrity aspects of the CIA triad, with potential cascading effects on safety-critical systems where accurate data and reliable operations are essential for preventing accidents or operational disruptions.
Organizations should implement immediate mitigations including strengthening access controls, implementing proper file permission settings, and conducting comprehensive privilege reviews for all users within the Monitor Pro interface. Network segmentation and monitoring of file access activities should be enhanced to detect and prevent unauthorized operations. The vulnerability aligns with CWE-284 which addresses improper access control issues, and represents a clear violation of the ATT&CK technique T1078 for valid accounts and T1566 for credential harvesting through legitimate access points. Regular security assessments and vulnerability scanning should be conducted to identify similar access control weaknesses in other system components. Additionally, implementing automated monitoring solutions that detect anomalous file access patterns and unauthorized modifications will help in early detection and response to potential exploitation attempts. The remediation process should include firmware updates from the vendor, comprehensive user access reviews, and establishment of proper audit trails for all file operations within the system.