CVE-2026-9128 in Studio 5000 Logix Designer
Summary
by MITRE • 07/14/2026
A code execution security issue exists within Studio 5000 Logix Designer® due to an unquoted search path in the External Tools configuration. The executable paths specified in the external tools configuration file are not properly quoted, and because these paths contain spaces, the operating system may resolve them to unintended executables placed earlier in the search order. If exploited, an attacker could plant a malicious executable in a location within the search path, resulting in arbitrary code execution with the same permissions of the user running the application.
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Analysis
by VulDB Data Team • 07/14/2026
The vulnerability under discussion represents a critical security flaw within Rockwell Automation's Studio 5000 Logix Designer software, specifically manifesting through an unquoted search path weakness in its External Tools configuration mechanism. This issue stems from improper handling of executable paths within the application's configuration files where paths containing spaces are not properly quoted during execution. The fundamental problem occurs because Windows operating systems follow a specific search order when resolving executables, and unquoted paths with spaces can be interpreted as multiple separate arguments rather than single path references, allowing attackers to manipulate the system's resolution process.
The technical exploitation of this vulnerability leverages the inherent behavior of Windows command execution where the system searches through directories listed in the PATH environment variable in a sequential order. When an executable path contains spaces and is not quoted, the operating system may interpret the path differently, potentially resolving it to a malicious executable placed in an earlier directory within the search path. This misinterpretation occurs because the system treats the space as a delimiter between separate arguments rather than part of the path string, creating opportunities for path traversal attacks that fall under the common weakness enumeration CWE-428. The vulnerability directly relates to the broader category of insecure direct object reference flaws and path manipulation techniques that have been extensively documented in security frameworks.
The operational impact of this vulnerability extends beyond simple code execution as it provides attackers with arbitrary code execution capabilities with the same privileges as the user running Studio 5000 Logix Designer. Since industrial control systems often run with elevated permissions, particularly in manufacturing environments where users may have administrative access to critical infrastructure, this vulnerability can lead to severe consequences including system compromise, data exfiltration, and potential disruption of industrial processes. The attack surface is particularly concerning in industrial settings where these applications are frequently used by operators who may not be security-aware, making the exploitation more likely through social engineering or insider threats. This vulnerability aligns with tactics described in the MITRE ATT&CK framework under T1059 for command and scripting interpreter and T1546 for persistence mechanisms.
Mitigation strategies should focus on immediate remediation through proper quoting of all executable paths within the External Tools configuration to prevent the operating system from misinterpreting spaces as argument delimiters. Organizations should implement strict access controls and privilege separation, ensuring that users running industrial automation software operate with minimal necessary permissions rather than administrative rights. Regular security assessments and penetration testing should be conducted to identify similar path traversal vulnerabilities in other industrial control system applications. Additionally, implementing application whitelisting policies can prevent unauthorized executables from running even if the path manipulation vulnerability is exploited. The remediation process should include comprehensive configuration reviews and security training for personnel who manage industrial control systems to reduce the risk of exploitation through social engineering or misconfiguration attacks that align with common attack patterns documented in industry security standards and frameworks.