CVE-2025-66263: Dbbroadcast Mozart Dds Next 1000 Firmware vulnerability (CVSS 7.5)

Description

Unauthenticated Arbitrary File Read via Null Byte Injection 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 Null byte injection in download_setting.php allows reading arbitrary files. The `/var/tdf/download_setting.php` endpoint constructs file paths by concatenating user-controlled `$_GET['filename']` with a forced `.tgz` extension. Running on PHP 5.3.2 (pre-5.3.4), the application is vulnerable to null byte injection (%00), allowing attackers to bypass the extension restriction and traverse paths. By requesting `filename=../../../../etc/passwd%00`, the underlying C functions treat the null byte as a string terminator, ignoring the appended `.tgz` and enabling unauthenticated arbitrary file disclosure of any file readable by the web server user.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Dbbroadcast Mozart Dds Next 1000 Firmwareall versions

Dbbroadcast Mozart Dds Next 100 Firmwareall versions

Dbbroadcast Mozart Dds Next 2000 Firmwareall versions

Dbbroadcast Mozart Dds Next 3000 Firmwareall versions

Dbbroadcast Mozart Dds Next 300 Firmwareall versions

Dbbroadcast Mozart Dds Next 30 Firmwareall versions

Dbbroadcast Mozart Dds Next 3500 Firmwareall versions

Dbbroadcast Mozart Dds Next 500 Firmwareall versions

Dbbroadcast Mozart Dds Next 50 Firmwareall versions

Dbbroadcast Mozart Dds Next 6000 Firmwareall versions

Dbbroadcast Mozart Dds Next 7000 Firmwareall versions

Dbbroadcast Mozart Next 1000 Firmwareall versions

Dbbroadcast Mozart Next 100 Firmwareall versions

Dbbroadcast Mozart Next 2000 Firmwareall versions

Dbbroadcast Mozart Next 3000 Firmwareall versions

Dbbroadcast Mozart Next 300 Firmwareall versions

Dbbroadcast Mozart Next 30 Firmwareall versions

Dbbroadcast Mozart Next 3500 Firmwareall versions

Dbbroadcast Mozart Next 500 Firmwareall versions

Dbbroadcast Mozart Next 50 Firmwareall versions

Dbbroadcast Mozart Next 6000 Firmwareall versions

Dbbroadcast Mozart Next 7000 Firmwareall versions

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

https://www.abdulmhsblog.com/posts/webfmvulns/ExploitThird Party Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-66263 being actively exploited?

CVE-2025-66263 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.39%.

How severe is CVE-2025-66263?

CVE-2025-66263 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.39% probability of exploitation.

Which products are affected by CVE-2025-66263?

Affected 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, and 17 more.

How do I fix CVE-2025-66263?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-66263 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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