Web interface hang via failed deletion loop
Published Nov 26, 2025 · Updated Dec 1, 2025
Denial of service in affected Mozart FM Transmitter models allows remote authenticated users to exhaust web server workers. In status_contents.php, a failed unlink() call leaves an empty file_exists() loop spinning indefinitely on an attacker-selected undeletable file. Administrative web access and a file that the PHP process cannot delete are required; concurrent requests can make the management interface unresponsive.
Summary
What happened
Denial of service in affected Mozart FM Transmitter models allows remote authenticated users to exhaust web server workers. In status_contents.php, a failed unlink() call leaves an empty file_exists() loop spinning indefinitely on an attacker-selected undeletable file. Administrative web access and a file that the PHP process cannot delete are required; concurrent requests can make the management interface unresponsive.
The record
- CVE
- CVE-2025-66252
- Published
- Nov 26, 2025
- Updated
- Dec 1, 2025
- Vendor
- DB Elettronica Telecomunicazioni S.p.A.
- Product
- Mozart FM Transmitter
- Classifications
- CWE-835, T1499.004
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Nov 26, 2025CVE publishedPublication date reported by the CVE source.
- Dec 1, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=100
- Affected versionversion=1000
- Affected versionversion=2000
- Affected versionversion=30
- Affected versionversion=300
- Affected versionversion=3000
- Affected versionversion=3500
- Affected versionversion=50
- Affected versionversion=500
- Affected versionversion=6000
- Affected versionversion=7000
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Failed-deletion infinite-loop proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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