CVE-2025-30047 in CLININET
Summary
by MITRE • 10/23/2026
CGM CLININET is vulnerable to Remote Code Execution caused by deserialization of untrusted data. The server exposes an HTTP-based API, used by the administrative module, that exchanges data using Java object serialization. An attacker within the same local network is able to send requests to this API and transmit a crafted serialized object. When it is deserialized, it allows arbitrary code execution with root privileges on the server.
This issue was fixed in version 2026.MS3
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Analysis
by VulDB Data Team • 10/23/2026
CGM CLININET contains a critical security vulnerability that permits Remote Code Execution through the insecure deserialization of untrusted data within its administrative module's HTTP-based API. This flaw stems from the system's reliance on Java object serialization to exchange information between components, a mechanism that inherently lacks integrity verification when handling external inputs. The architectural design exposes an endpoint accessible via standard web protocols, which processes incoming serialized objects without adequate validation or sanitization checks. Consequently, any entity capable of reaching this network service can interact with the deserialization logic directly, bypassing normal application constraints and gaining unauthorized access to underlying system resources.
The technical nature of this vulnerability aligns closely with CWE-502, which describes Deserialization of Untrusted Data as a significant weakness in software design. When an attacker transmits a crafted serialized object containing malicious payload code, the Java runtime environment interprets these objects during the deserialization process. This interpretation allows for the instantiation of arbitrary classes and the execution of their methods before control returns to the application logic. Because the administrative module typically operates with elevated permissions to manage system configurations and patient data, the resulting command execution inherits these high-level privileges, often equivalent to root or administrator access on the host server.
From an operational perspective, this vulnerability poses a severe risk to healthcare information systems due to its potential for complete system compromise. An attacker positioned within the same local network segment can exploit this flaw without requiring valid authentication credentials, leveraging the trust relationship inherent in internal network communications. Successful exploitation enables the insertion of malware, modification or exfiltration of sensitive patient health records stored on the server, and use of the compromised machine as a pivot point for further attacks against other connected devices. This scenario reflects common tactics observed in ATT&CK framework techniques related to Command and Scripting Interpreter execution via deserialization exploits, highlighting the critical need for immediate remediation in clinical environments where system availability and data integrity are paramount.
Mitigation strategies must prioritize both technical fixes and architectural improvements. The primary resolution involves upgrading CGM CLININET to version 2026.MS3 or later, which addresses this specific flaw by implementing secure deserialization practices such as input validation, class whitelisting, or switching to safer data formats like JSON that do not support arbitrary code execution during parsing. Additionally, network segmentation should be enforced to restrict access to administrative APIs exclusively to trusted management subnets, thereby reducing the attack surface for lateral movement from compromised endpoints. Implementing strict firewall rules and monitoring API traffic for anomalous serialized payloads can provide additional layers of defense while ensuring compliance with healthcare data protection standards that mandate robust security controls against remote exploitation vectors.