CVE-2026-84147 in Multi-tenant ERP System
Summary
by MITRE • 09/01/2026
This vulnerability exists in the ERP system due to improper authentication controls and inadequate file type validation at the API endpoint. An unauthenticated remote attacker could exploit this vulnerability by uploading arbitrary files to a web accessible directory on the targeted system
Successful exploitation of this vulnerability could allow the attacker to execute arbitrary code and compromise the targeted system.
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Analysis
by VulDB Data Team • 09/01/2026
The identified security flaw resides within an Enterprise Resource Planning (ERP) system, specifically manifesting at its application programming interface endpoints where file upload functionality is exposed to external networks. The core technical deficiency stems from a combination of improper authentication controls and insufficient validation mechanisms for uploaded files. This dual failure creates a critical attack vector that allows unauthenticated remote actors to bypass security boundaries entirely. By exploiting the lack of robust access control, an attacker can interact with sensitive system components without valid credentials. Furthermore, the inadequate file type validation means the application fails to rigorously inspect or restrict the nature of data being submitted through these endpoints. This oversight permits the ingestion of malicious payloads that would typically be rejected by a properly secured system designed to handle only specific, safe file formats such as images or documents.
The operational impact of this vulnerability is severe and potentially catastrophic for organizational integrity. Because an unauthenticated attacker can upload arbitrary files directly into web-accessible directories on the targeted server, they effectively gain the ability to place executable scripts within a location that the web server will process and serve. This scenario constitutes a classic Remote Code Execution (RCE) condition. Once malicious code is successfully uploaded and executed by the server environment, the attacker can take full control of the underlying operating system or application runtime. This level of compromise allows for data exfiltration, modification of critical business records stored within the ERP database, installation of persistent backdoors, and use of the compromised host as a pivot point to attack other systems on the internal network. The absence of authentication requirements further exacerbates the risk by removing any barrier that might have limited exposure or provided audit trails for such actions.
From a classification perspective, this vulnerability aligns with CWE-434 Unrestricted Upload of File with Dangerous Type and CWE-287 Improper Authentication. These weaknesses are frequently leveraged in conjunction to achieve arbitrary code execution, which is mapped to the MITRE ATT&CK technique T1505 Server Software Component: Web Shell. The exploitation path involves uploading a web shell or similar executable script that interacts directly with the server's processing engine. To mitigate this risk, immediate remediation efforts must focus on implementing strict allow-lists for permitted file extensions and MIME types at both the client-side interface level and, more importantly, within the backend API logic. Additionally, enforcing strong authentication mechanisms such as OAuth2 or JWT tokens is essential to ensure that only authorized users can access upload endpoints. Files should also be stored outside of web-accessible directories whenever possible, with execution permissions explicitly disabled on storage volumes containing user-uploaded content. Regular security testing and code reviews are recommended to identify similar patterns in other parts of the application architecture.