CVE-2025-66257 is a critical (CVSS 9.1) unauthenticated arbitrary file deletion in the Mozart FM Transmitter. The deletepatch parameter in patch_contents.php deletes files in the patch directory without sanitization or access control checks. The record names no fix, so isolate the management interface and contact the vendor.
What's affected
- Product: Mozart FM Transmitter from DB Electronica Telecomunicazioni S.p.A. (DB Broadcast), web management interface. The record lists models 30, 50, 100, 300, 500, 1000, 2000, 3000, 3500, 6000 and 7000.
- Component: patch_contents.php and its deletepatch parameter, which acts on files in /var/www/patch/.
- Fixed: neither the record nor the researcher write-up we read names a fixed firmware version or a vendor advisory. Contact the vendor for patch status before assuming one exists.
- Severity: the record scores it 9.1 (critical) with the vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H. The record vector shows high integrity and availability impact with no confidentiality impact.
How to check if you're exposed
This is a broadcast appliance, so there is no package manager to query. Work from the device and the network.
- Build a list of every Mozart unit you run, with its model and the web interface version string. The researcher write-up refers to the web management interface version WEBMOZZI-00287.
- Find out whether the management web interface of each unit is reachable from the internet, from a partner network or from a flat internal network. Check firewall rules and any remote access gateway.
- Look at the web server logs on a device you can inspect, or at the logs of any proxy in front of it, for requests to the PHP file named in this CVE from addresses you do not recognize.
If the interface is reachable by people outside the small group that needs it, treat the device as exposed.
What to do now
- Take the management interface off the internet and off any shared network. Put it behind a VPN or a jump host, with an allow list of administrator addresses.
- Ask DB Broadcast for the patch status of this CVE and for a firmware version that fixes it. Record the answer with your asset notes.
- Back up the patch directory from a known good state so you can restore it if files go missing.
- Watch the device for unexpected files, new accounts, changed settings or reboots, and keep a known good copy of its configuration to compare against.
- Add the rest of your internet facing software to an inventory. Safeguard cannot patch a transmitter, but a free in-browser scan at gold.safeguard.sh/scan and a proper asset inventory help you find the other internet facing software you run, and reachability analysis helps you rank what to fix first.
Why it matters
The weakness is CWE-73, external control of a file name or path. According to the record, the parameter deletes files in the patch directory with no sanitization and no access control check, so no login is needed.
The missing access control check is the key detail. Even if the path were fixed, a page that lets any visitor remove files is a risk. Treat the whole management interface as something that must not be reachable by people who do not need it, and expect to need a vendor fix for the underlying code. The record does not mark this as exploited in the wild and it is not on the CISA KEV list. The advisory trail is thin, since the main public source is a researcher write-up rather than a vendor bulletin, so confirm facts with the vendor. Appliances of this kind sit for years without updates, which is why network isolation is the control you can apply today.
Quick check
Which directory is affected?
The patch directory, according to the record.
Does this need authentication?
No. The record says there is no access control check.
Sources
- Researcher write-up: 14 vulnerabilities in the Mozart FM Transmitter web interface
- Safeguard Gold entry
Last reviewed: 18 October 2026.
