CVE-2025-66263: Dbbroadcast Mozart Dds Next 1000 Firmware

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Unauthenticated Arbitrary File Read via Null Byte Injection 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 Null byte injection in download_setting.php allows reading arbitrary files. The `/var/tdf/download_setting.php` endpoint constructs file paths by concatenating user-controlled `$_GET['filename']` with a forced `.tgz` extension. Running on PHP 5.3.2 (pre-5.3.4), the application is vulnerable to null byte injection (%00), allowing attackers to bypass the extension restriction and traverse paths. By requesting `filename=../../../../etc/passwd%00`, the underlying C functions treat the null byte as a string terminator, ignoring the appended `.tgz` and enabling unauthenticated arbitrary file disclosure of any file readable by the web server user.

Affected products

• Dbbroadcast Mozart Dds Next 1000 Firmware: affected versions not specified
• Dbbroadcast Mozart Dds Next 100 Firmware: affected versions not specified
• Dbbroadcast Mozart Dds Next 2000 Firmware: affected versions not specified
• Dbbroadcast Mozart Dds Next 3000 Firmware: affected versions not specified
• Dbbroadcast Mozart Dds Next 300 Firmware: affected versions not specified
• Dbbroadcast Mozart Dds Next 30 Firmware: affected versions not specified
• Dbbroadcast Mozart Dds Next 3500 Firmware: affected versions not specified
• Dbbroadcast Mozart Dds Next 500 Firmware: affected versions not specified
• Dbbroadcast Mozart Dds Next 50 Firmware: affected versions not specified
• Dbbroadcast Mozart Dds Next 6000 Firmware: affected versions not specified
• Dbbroadcast Mozart Dds Next 7000 Firmware: affected versions not specified
• Dbbroadcast Mozart Next 1000 Firmware: affected versions not specified
• Dbbroadcast Mozart Next 100 Firmware: affected versions not specified
• Dbbroadcast Mozart Next 2000 Firmware: affected versions not specified
• Dbbroadcast Mozart Next 3000 Firmware: affected versions not specified
• Dbbroadcast Mozart Next 300 Firmware: affected versions not specified
• Dbbroadcast Mozart Next 30 Firmware: affected versions not specified
• Dbbroadcast Mozart Next 3500 Firmware: affected versions not specified
• Dbbroadcast Mozart Next 500 Firmware: affected versions not specified
• Dbbroadcast Mozart Next 50 Firmware: affected versions not specified
• Dbbroadcast Mozart Next 6000 Firmware: affected versions not specified
• Dbbroadcast Mozart Next 7000 Firmware: affected versions not specified

Published 2025-11-26. Last modified 2026-06-17.