Executive brief
Frauscher FDS102 is a diagnostic system used in railway signaling and track management. A high-privileged attacker can upload malicious PHP files through the web interface and execute them directly, achieving complete compromise of the underlying system including access to sensitive railway infrastructure data.
Technical details
This vulnerability is a classic unrestricted file upload (CWE-434) affecting the FDS102 web interface. A high-privileged remote attacker can bypass file type validation to upload PHP files to the /uploads/ directory and subsequently request them directly via HTTP to achieve arbitrary code execution. The root cause is improper validation of uploaded file types before storing them in a web-accessible location. Attack precondition: the attacker must have high administrative privileges on the FDS102 system. Exploitation results in full system compromise, including potential access to sensitive railway signaling and track layout information. A fix is available: update to FDS102 v2.14.0 or later.
Affected products
- Frauscher Sensortechnik GmbH FDS102 2.0.0 through 2.13.3
Timeline
- 2026-08-25: disclosed: CVE-2026-14946 published
- 2026-08-20: patched: FDS102 v2.14.0 released as remediation