CVE-2026-9127 in Studio 5000 Logix Designer
Summary
by MITRE • 07/14/2026
A remote code execution security issue exists within Studio 5000 Logix Designer® due to incorrect authorization on a configuration file. This can allow any authenticated user to modify the paths of external tools configured within the application. If exploited, an attacker could alter the configuration to point to a malicious executable, resulting in arbitrary code execution when any user interacts with the external tools functionality.
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Analysis
by VulDB Data Team • 07/14/2026
The vulnerability under discussion represents a critical remote code execution flaw within Studio 5000 Logix Designer®, a widely used industrial automation software developed by Rockwell Automation. This security weakness stems from improper authorization controls governing configuration file access, specifically targeting the application's handling of external tool paths. The flaw exists at the authorization layer where the system fails to properly validate user permissions when modifying critical configuration parameters that dictate how external tools are invoked within the software environment.
This vulnerability manifests through a privilege escalation vector that allows any authenticated user to manipulate the configuration settings that determine which executables are launched when users interact with external tool functionality. The technical flaw operates at the application configuration management level, where the software does not adequately enforce access controls on critical configuration parameters. When an attacker modifies these paths to reference malicious executables, the system's trust model is violated, enabling arbitrary code execution on systems running the vulnerable software.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass full system compromise within industrial control environments. Any authenticated user can potentially gain unauthorized code execution privileges, which represents a significant threat to operational technology infrastructure. The attack surface becomes particularly dangerous in industrial settings where multiple users may have legitimate access to the software but should not possess the ability to modify core application functionality. This vulnerability directly impacts the integrity and availability of industrial control systems by enabling attackers to inject malicious payloads that execute with the privileges of the affected user.
The security implications align with CWE-284, which addresses improper access control in software systems, and demonstrates characteristics consistent with ATT&CK technique T1059.007 for command and script interpreter. Organizations using Studio 5000 Logix Designer® face potential compromise of their industrial automation environments, where attackers could establish persistent backdoors or deploy additional malware through the executed malicious code. The vulnerability's exploitation requires only authenticated access, making it particularly concerning in environments where user access controls are not properly enforced at the application level.
Mitigation strategies should focus on implementing proper authorization controls for configuration file modifications, including role-based access controls that restrict modification privileges to authorized administrators only. System administrators should ensure that only designated personnel have the ability to modify external tool configurations and that all user accounts maintain appropriate privilege levels according to the principle of least privilege. Additionally, regular security assessments should verify that configuration files are properly protected against unauthorized modification attempts, with monitoring systems in place to detect suspicious changes to critical application parameters.
The vulnerability underscores the importance of secure configuration management in industrial control environments and highlights the need for comprehensive security hardening practices in operational technology systems. Organizations must implement proper access controls and privilege management to prevent authenticated users from modifying critical application settings that could lead to system compromise. Regular patch management and security updates should be prioritized to address known vulnerabilities in industrial automation software, as these systems often operate in environments where traditional cybersecurity measures may not be fully implemented or maintained.