CVE-2025-66255: Unauthenticated Arbitrary File Upload (upgrade_contents.php)

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-11-26 · updated 2026-10-18
Weakness: CWE-345

Description

Unauthenticated Arbitrary File Upload (upgrade_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 Missing signature validation allows uploading malicious firmware packages. The firmware upgrade endpoint in `upgrade_contents.php` accepts arbitrary file uploads without validating file headers, cryptographic signatures, or enforcing .tgz format requirements, allowing malicious firmware injection. This endpoint also subsequently provides ways for arbitrary file uploads and subsequent remote code execution

Affected products

Dbbroadcast Mozart Dds Next 1000 Firmware: all versions
Dbbroadcast Mozart Dds Next 100 Firmware: all versions
Dbbroadcast Mozart Dds Next 2000 Firmware: all versions
Dbbroadcast Mozart Dds Next 3000 Firmware: all versions
Dbbroadcast Mozart Dds Next 300 Firmware: all versions
Dbbroadcast Mozart Dds Next 30 Firmware: all versions
Dbbroadcast Mozart Dds Next 3500 Firmware: all versions
Dbbroadcast Mozart Dds Next 500 Firmware: all versions
Dbbroadcast Mozart Dds Next 50 Firmware: all versions
Dbbroadcast Mozart Dds Next 6000 Firmware: all versions
Dbbroadcast Mozart Dds Next 7000 Firmware: all versions
Dbbroadcast Mozart Next 1000 Firmware: all versions
Dbbroadcast Mozart Next 100 Firmware: all versions
Dbbroadcast Mozart Next 2000 Firmware: all versions
Dbbroadcast Mozart Next 3000 Firmware: all versions
Dbbroadcast Mozart Next 300 Firmware: all versions
Dbbroadcast Mozart Next 30 Firmware: all versions
Dbbroadcast Mozart Next 3500 Firmware: all versions
Dbbroadcast Mozart Next 500 Firmware: all versions
Dbbroadcast Mozart Next 50 Firmware: all versions
Dbbroadcast Mozart Next 6000 Firmware: all versions
Dbbroadcast Mozart Next 7000 Firmware: all versions

References

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