CVE-2026-16306 in System Manager
Summary
by MITRE • 11/02/2026
Remote Code Execution in the `IModular.exe` URI handler in INFINITT Healthcare Co., Ltd. INFINITT PACS allows a remote unauthenticated attacker to invoke unintended application functionality and potentially execute arbitrary code via a crafted `imodular:// URI` containing attacker-controlled command and argument parameters.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 11/02/2026
The vulnerability identified within the INFINITT PACS software, specifically affecting the IModular.exe component, represents a critical Remote Code Execution flaw rooted in improper handling of Uniform Resource Identifier handlers. This security defect allows an unauthenticated remote attacker to interact with the application through specially crafted URIs that utilize the imodular:// protocol scheme. In modern operating systems and web technologies, URI schemes are designed to map specific protocols to associated applications or services, enabling seamless integration between browsers or other clients and local software. However, in this instance, the IModular.exe executable fails to adequately validate or sanitize the parameters passed via these URIs before processing them. This lack of input validation creates a direct pathway for an attacker to inject malicious command-line arguments that are subsequently executed by the vulnerable application with the privileges of the user currently running the PACS software.
From a technical perspective, this vulnerability is classified under CWE-78 Improper Neutralization of Special Elements used in an OS Command commonly known as OS Command Injection. The core issue lies in the failure to escape or filter special characters and command sequences within the URI parameters. When a user clicks on a link containing a malicious imodular:// URL, the operating system invokes IModular.exe and passes the contents of the URI directly into its argument parsing logic. Because the application does not distinguish between legitimate configuration data and executable code fragments, it interprets attacker-controlled input as part of the command line structure. This allows for the execution of arbitrary commands on the underlying host machine, effectively bypassing any intended access controls since no authentication is required to trigger this behavior.
The operational impact of this vulnerability is severe due to its remote nature and lack of authentication requirements. An attacker can exploit this flaw from a network location without needing valid credentials or prior interaction with the system beyond delivering the malicious link. This could be achieved through various vectors such as phishing emails, compromised websites using drive-by download techniques, or other social engineering tactics where a victim is induced to click on a seemingly benign but technically malicious URI. Once executed, the arbitrary code runs in the context of the user account associated with INFINITT PACS. Depending on the security configuration of the workstation and the privileges assigned to that specific user account, this could lead to full system compromise. The attacker gains the ability to read sensitive medical data stored locally, modify patient records, install additional malware such as ransomware or backdoors, and potentially pivot further into the hospital network if the PACS server is accessible from the compromised endpoint.
This vulnerability aligns with several tactics in the MITRE ATT&CK framework, particularly T1204 User Execution which describes adversaries relying on users to execute malicious code by tricking them into opening a file or clicking a link. It also relates to T1059 Command and Scripting Interpreter as it involves the direct execution of system commands through an application interface. The exploitation method leverages the trust relationship between web content and local applications, a common attack surface in enterprise environments where specialized medical software often integrates with standard browsing experiences for ease of use but lacks robust security boundaries.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The primary solution is to apply vendor-provided patches or updates that address the input validation logic within IModular.exe, ensuring that all URI parameters are strictly sanitized against command injection patterns. Until such a patch is available, organizations should consider disabling the imodular:// protocol handler in the operating system registry if it is not essential for daily operations, thereby preventing the OS from invoking the vulnerable executable via URIs. Additionally, implementing strict application whitelisting policies can prevent unauthorized executables or scripts from running even if an injection attempt succeeds. Network segmentation and monitoring of outbound connections from PACS workstations are also recommended to detect any anomalous behavior indicative of exploitation attempts. Regular security awareness training for staff is crucial to reduce the likelihood of successful social engineering attacks that deliver these malicious URIs.