CVE-2026-82789 in CONPROSYS HMI System
Summary
by MITRE • 09/14/2026
An improper neutralization of directives in dynamically evaluated code ('Eval Injection') issue exists in CONPROSYS HMI System(CHS). If exploited, arbitrary code may be executed by an attacker who can log in to the product.
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Analysis
by VulDB Data Team • 09/14/2026
The vulnerability identified as CVE-2024-something related to CONPROSYS HMI Systems represents a critical security flaw classified under CWE-95, commonly known as Improper Neutralization of Directives in Dynamically Evaluated Code or more broadly as Command Injection via eval. This specific type of injection occurs when an application uses dynamic code evaluation functions, such as JavaScript's eval() function or similar constructs in other languages, to process user-supplied input without adequate sanitization or validation. In the context of CONPROSYS HMI Systems, which are widely deployed in industrial automation and control environments for monitoring and controlling machinery, this flaw allows an attacker who has successfully authenticated to the system to inject malicious scripts that will be executed by the application's runtime environment. The core technical failure lies in the lack of strict input validation and the direct passage of user-controlled data into a context where it is interpreted as executable code rather than static text or safe parameters.
From an operational perspective, the impact of this vulnerability is severe due to the privileged nature typically associated with Human-Machine Interface systems within industrial networks. An attacker who can log in to the product gains the ability to execute arbitrary commands on the underlying operating system hosting the HMI software. This capability effectively bypasses any intended access controls and allows for full compromise of the host machine. The consequences extend beyond simple data theft; an adversary could manipulate process parameters, halt production lines, alter safety settings, or use the compromised HMI as a pivot point to launch further attacks against other devices on the industrial control network. This aligns with MITRE ATT&CK technique T1059, specifically Command and Scripting Interpreter sub-techniques like T1059.001 for PowerShell or T1059.004 for Unix Shell commands, depending on the specific implementation details of the HMI's backend logic.
The exploitation vector requires prior authentication, which classifies this as an authenticated attack rather than a remote unauthenticated exploit. However, in many industrial environments, default credentials are often left unchanged or weak passwords are used due to operational convenience and lack of security awareness among plant personnel. Therefore, while the technical requirement is login access, the practical risk remains high because initial access can be easily obtained through credential stuffing or social engineering if proper identity management practices are not enforced. Once inside, the attacker does not need complex privilege escalation exploits; they simply need to craft a payload that triggers the eval function with malicious directives, leading directly to code execution on the server side.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The primary technical fix involves updating CONPROSYS HMI Systems to versions where this vulnerability has been patched by the vendor, ensuring that dynamic evaluation is either removed or strictly constrained to allow only predefined, safe operations with no user input directly influencing the code structure. If patching is not immediately feasible, administrators should implement strict input validation and output encoding for all fields that interact with backend logic. Additionally, deploying web application firewalls configured to detect injection patterns can provide a layer of defense in depth. From an organizational standpoint, enforcing strong password policies, implementing multi-factor authentication where supported, and segmenting the industrial network are critical steps to limit the blast radius should such a vulnerability be exploited. Regular security audits and penetration testing focused on authenticated web application flaws are also recommended to identify similar weaknesses before they can be leveraged by adversaries.