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VulnerabilityPublished Updated

CVE-2025-66253: DB Electronica Telecomunicazioni S.p.A Mozart FM Transmitter · Unauthenticated OS Command Injection

Affects DB Electronica Telecomunicazioni S.p.A Mozart FM TransmitterSource CVE Database V5

0

Not known to be exploited · CVSS 9.9 Critical.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 4.0 base score
9.9Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
2.3% chance of exploitation in 30 days – higher than 83% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Nov 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
DB Electronica Telecomunicazioni S.p.A. Mozart FM TransmitterAffected
  • 30 – 7000
11 affected builds
Fixed in–

AI-suggested

  1. Immediate network segmentation: Isolate affected Mozart FM Transmitter devices from public and untrusted networks to prevent unauthorized access to the start_upgrade.php endpoint.
  2. Access control: Implement strict firewall rules and access control lists (ACLs) to restrict access to the vulnerable endpoint only to trusted management networks or IP addresses.
  3. Monitoring and detection: Deploy network and host-based intrusion detection systems (IDS) to monitor for suspicious requests targeting start_upgrade.php or unusual command execution patterns on the devices.
  4. Vendor engagement: Engage with DB Electronica Telecomunicazioni S.p.A. to obtain patches or firmware updates addressing the vulnerability as soon as they become available.
  5. Temporary workaround: If patching is not immediately possible, consider disabling or restricting access to the start_upgrade.php script or the web management interface entirely, if operationally feasible.
  6. Incident response readiness: Prepare for potential exploitation by establishing incident response plans specific to broadcast infrastructure compromise.
  7. Regular audits: Conduct security audits and penetration tests focusing on broadcast and telecommunications equipment to identify similar vulnerabilities.
  8. User training: Educate network administrators and operators about the risks of exposing management interfaces and the importance of secure configuration.

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).

References

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