Is CVE-2025-66255 actively exploited?

No active exploitation of CVE-2025-66255 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-66255 be exploited remotely?

Yes. CVE-2025-66255 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-66255?

CVE-2025-66255 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2025-66255

CRITICAL

CVE-2025-66255

CWE-345Published: November 26, 2025· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Unauthenticated Arbitrary File Upload (upgrade_contents.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 Missing signature validation allows uploading malicious firmware packages.

The firmware upgrade endpoint in `upgrade_contents.php` accepts arbitrary file uploads without validating file headers, cryptographic signatures, or enforcing .tgz format requirements, allowing malicious firmware injection. This endpoint also subsequently provides ways for arbitrary file uploads and subsequent remote code execution

NVD Source

Risk Analysis

DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitters are vulnerable to unauthenticated arbitrary file upload via the 'upgrade_contents.php' endpoint due to missing signature validation. This critical vulnerability, with a CVSS score of 9.8, allows an unauthenticated attacker to inject malicious firmware packages, leading to arbitrary file uploads and remote code execution. The flaw is remotely exploitable.

No public exploit is known for this vulnerability. The flaw is remotely exploitable due to its network attack vector and low attack complexity.

Recommended Action

Implement robust cryptographic signature validation for all firmware upgrades. Ensure that only trusted and signed firmware packages can be uploaded and installed.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2025-66255 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

dbbroadcast44 product(s)

mozart next 3000 firmwaremozart next 3000mozart next 3500 firmwaremozart next 3500mozart next 50 firmwaremozart next 50mozart next 500 firmwaremozart next 500mozart next 6000 firmwaremozart next 6000mozart next 7000 firmwaremozart next 7000+32

Source: NVD CPE · 44 total CPE entries