CVE-2025-66256
CWE-434Published: November 26, 2025· Updated: Jun 17, 2026
Official Description
Unauthenticated Arbitrary File Upload (patch_contents.php) in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter versions 30, 50, 100, 300, 500, 1000, 2000, 3000, 3500, 6000, 7000 allows an attacker to perform Unrestricted file upload in patch_contents.php allows uploading malicious files.
The `/var/tdf/patch_contents.php` endpoint allows unauthenticated arbitrary file uploads without file type validation, MIME checking, or size restrictions beyond 16MB, enabling attackers to upload malicious files.
Risk Analysis
DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitters are vulnerable to unauthenticated arbitrary file upload through the 'patch_contents.php' endpoint. This critical vulnerability, with a CVSS score of 9.8, allows an unauthenticated attacker to upload malicious files without any validation, potentially leading to further compromise. The flaw is remotely exploitable.
No public exploit is known for this vulnerability. The flaw is remotely exploitable due to its network attack vector and low attack complexity.
Implement strict file type, MIME, and size validation for all file uploads. Ensure that uploaded files are stored in a secure location and scanned for malware.
Technical Analysis
CVE-2025-66256 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (2)
Quick Facts
Related CVEs (CWE-434)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2025-66256 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts