Mozart FM Transmitter: Loop with Unreachable Exit Condition
CVE-2025-66252 is a high-severity loop with unreachable exit condition vulnerability in Mozart FM Transmitter from DB Electronica Telecomunicazioni S.p.A., with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Mozart FM Transmitter versions: 30; 50; 100, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.39% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Mozart FM Transmitter you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| DB Electronica Telecomunicazioni S.p.A. | Mozart FM Transmitter | 30; 50; 100; 300; 500; 1000; 2000; 3000; and 3 more ranges | Not stated |
| Dbbroadcast | Mozart Next 100 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Next 1000 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Next 2000 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Next 30 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Next 300 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Next 3000 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Next 3500 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Next 50 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Next 500 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Next 6000 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Next 7000 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Dds Next 30 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Dds Next 50 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Dds Next 100 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Dds Next 300 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Dds Next 500 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Dds Next 1000 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Dds Next 2000 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Dds Next 3000 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Dds Next 3500 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Dds Next 6000 Firmware | Not specified in the record | Not stated |
| Dbbroadcast | Mozart Dds Next 7000 Firmware | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 8.4 | High | CNA |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
Infinite Loop Denial of Service via Failed File Deletion 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 Infinite loop when unlink() fails in status_contents.php causing DoS. Due to the fact that the unlink operation is done in a while loop; if an immutable file is specified or otherwise a file in which the process has no permissions to delete; it would repeatedly attempt to do in a loop.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Loop with Unreachable Exit Condition
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
More Loop with Unreachable Exit Condition vulnerabilities (CWE-835)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Technical write-ups (may include proof of concept)
- abdulmhsblog.com/posts/webfmvulns/Exploit, Third Party Advisory
Other vulnerabilities in Mozart FM Transmitter
- 7.5 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.1 Critical severity
- 9.8 Critical severity
Recent Loop with Unreachable Exit Condition vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.7 High severity
- 8.6 High severity
- 8.6 High severity
- 8.6 High severity
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