CVE-2025-39201 in MicroSCADA X SYS600
Summary
by MITRE • 06/24/2025
A vulnerability exists in MicroSCADA X SYS600 product. If exploited this could allow a local unauthenticated attacker to tamper a system file, making denial of Notify service.
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Analysis
by VulDB Data Team • 01/27/2026
The vulnerability identified as CVE-2025-39201 affects the MicroSCADA X SYS600 industrial control system product, representing a significant security weakness that could compromise critical infrastructure operations. This flaw resides within the system's file access controls and privilege management mechanisms, creating an exploitable condition that allows unauthorized local access to system files. The vulnerability specifically targets the notification service functionality, which is essential for maintaining operational integrity and alerting mechanisms in industrial environments. The affected product operates within industrial control systems where reliability and security are paramount, making this vulnerability particularly concerning for critical infrastructure sectors including manufacturing, energy, and water treatment facilities.
The technical nature of this vulnerability stems from inadequate file system permissions and access control enforcement within the MicroSCADA X SYS600 platform. An attacker with local system access can exploit this weakness to modify critical system files that govern the notification service behavior. This type of vulnerability aligns with CWE-276, which describes improper file permissions, and represents a privilege escalation vector that could lead to broader system compromise. The flaw likely involves insufficient validation of file modification requests or improper enforcement of access control lists that should prevent unauthorized tampering with system-critical components. The vulnerability's local nature suggests it requires physical or network access to the system, but the lack of authentication requirements for file modification creates a dangerous attack surface that could be leveraged by insiders or compromised users.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the integrity of industrial control processes that depend on reliable notification systems. When an attacker can tamper with system files controlling the notification service, they can effectively disable or manipulate critical alerts that monitor system health, security events, or operational parameters. This capability could lead to undetected system failures, security breaches, or operational disruptions that might go unnoticed for extended periods. The denial of notification service functionality directly impacts incident response capabilities and system monitoring, potentially allowing other attacks to go undetected while the compromised notification system fails to alert operators to critical conditions. This vulnerability particularly threatens environments where real-time monitoring and rapid response to system events are essential for safety and operational continuity, as defined by industrial cybersecurity frameworks and standards such as IEC 62443.
Mitigation strategies for this vulnerability should focus on implementing robust access controls and privilege management within the MicroSCADA X SYS600 environment. System administrators should enforce strict file permission settings and implement mandatory access controls that prevent unauthorized modification of system-critical files. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in the system configuration. The implementation of file integrity monitoring solutions can help detect unauthorized modifications to critical system files, while network segmentation and least-privilege access models can limit potential attack surfaces. Organizations should also consider implementing intrusion detection systems specifically designed for industrial environments to monitor for suspicious file access patterns and unauthorized modifications. Compliance with cybersecurity standards such as NIST SP 800-82 and IEC 62443 guidelines should be maintained to ensure proper security controls are in place. Additionally, regular firmware updates and security patches should be applied to address known vulnerabilities and maintain the system's security posture against evolving threats.