CVE-2026-14952 in FDS
Summary
by MITRE • 08/20/2026
An unauthenticated remote attacker can retrieve sensible files from the FDS Web server, such as the backup archive at /FdsBackup.zip and additional files under /downloads/*, directly over HTTP without a valid session. These files disclose detailed railway signaling and track layout information that should not be available to unauthenticated users.
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Analysis
by VulDB Data Team • 08/20/2026
The vulnerability described constitutes a critical insecure direct object reference (IDOR) flaw within the FDS Web server interface, allowing for the unauthorized retrieval of sensitive configuration data without requiring any form of authentication or valid session tokens. This specific weakness aligns with CWE-200, which categorizes exposure of sensitive information to an unauthorized actor, and is further characterized by CWE-359 regarding exposure of private personal information when such data pertains to operational security contexts. The core technical flaw lies in the server's failure to enforce access control checks on specific URL paths, specifically /FdsBackup.zip and the directory structure under /downloads/*. By permitting direct HTTP requests to these endpoints without verifying user identity or privileges, the application effectively bypasses its own authentication mechanisms, exposing internal system states that are intended to be restricted.
The operational impact of this vulnerability is severe due to the nature of the disclosed data, which includes detailed railway signaling and track layout information. In industrial control systems and critical infrastructure environments such as rail transport, accurate mapping of signal configurations and physical track layouts is paramount for safe operations. The exposure of a backup archive containing these details provides an attacker with a comprehensive blueprint of the system's architecture and operational logic. This level of disclosure facilitates advanced reconnaissance efforts, enabling potential adversaries to map out network topology, identify critical control points, and understand the interdependencies between various signaling components. Such information significantly lowers the barrier for subsequent attacks, as it allows for targeted exploitation of known weaknesses in specific hardware or software versions that manage these signals.
From a threat modeling perspective using the MITRE ATT&CK framework, this vulnerability directly supports the Reconnaissance phase (TA0043), specifically under techniques such as Gathering Network Information (T1592) and potentially System Configuration Discovery if additional metadata is exposed within the backup files. The ability to retrieve sensitive configuration data unauthenticated represents a fundamental failure in security architecture principles, particularly the principle of least privilege and defense in depth. It suggests that the web server treats administrative or internal resources as publicly accessible, likely due to misconfigured directory permissions or missing authentication middleware on these specific routes. This oversight creates a significant attack surface where automated scanning tools can easily enumerate and download sensitive files without triggering typical intrusion detection alerts associated with brute-force attacks or credential stuffing.
Mitigation strategies must focus immediately on restricting access to administrative interfaces and backup repositories. The most effective remediation involves implementing strict authentication requirements for all endpoints under the /FdsBackup.zip path and the entire /downloads/ directory structure, ensuring that only authorized personnel with valid credentials can request these resources. Additionally, web server configuration should be audited to ensure that sensitive files are not served via public-facing directories; instead, they should reside in protected areas of the file system accessible only through authenticated application logic. Implementing robust access control lists (ACLs) and verifying that all administrative functions require multi-factor authentication can further reduce risk. Regular security assessments and penetration testing focused on insecure direct object references are essential to identify similar misconfigurations across other parts of the web server infrastructure, ensuring that sensitive operational data remains isolated from untrusted networks.