CVE-2025-66253 Unauthenticated OS Command Injection (start_upgrade.php)
Unauthenticated attackers can execute arbitrary OS commands via the start_upgrade.php endpoint in Mozart FM Transmitters, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-66253?
CVE-2025-66253 is a critical command injection vulnerability in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter, published on 26 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Unauthenticated OS Command Injection (start_upgrade.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 User input passed directly to exec() allows remote code execution via start_upgrade.php. The `/var/tdf/start_upgrade.php` endpoint passes user-controlled `$_GET["filename"]` directly into `exec()` without sanitization or shell escaping. Attackers can inject arbitrary shell commands using metacharacters (`;`, `|`, etc.) to achieve remote code execution as the web server user (likely root).
Weakness: CWE-78
Which versions are affected by CVE-2025-66253?
It affects 22 products.
Products include Dbbroadcast Mozart Dds Next 1000 Firmware, Dbbroadcast Mozart Dds Next 100 Firmware, Dbbroadcast Mozart Dds Next 2000 Firmware, Dbbroadcast Mozart Dds Next 3000 Firmware, Dbbroadcast Mozart Dds Next 300 Firmware, Dbbroadcast Mozart Dds Next 30 Firmware and 16 more.
How do I fix CVE-2025-66253?
No fix has been published for CVE-2025-66253 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2025-66253 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-66253 exists.
Other vulnerabilities in DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter
- CVE-2025-66255 Unauthenticated Arbitrary File Upload (upgrade_contents.php)
- CVE-2025-66256 Unauthenticated Arbitrary File Upload (patch_contents.php)
- CVE-2025-66261 Unauthenticated OS Command Injection (restore_settings.php)
- CVE-2025-63228 File upload in n/a
- CVE-2025-66259 Authenticated Root Remote Code Execution through improper filtering of HTTP post request parameters
Sources
Also known as GHSA-998x-7989-c3gf.