Cyber Resilience

CVE-2025-66254

Path Traversal in Dbbroadcast Mozart Next 100 Firmware

Public PoCPath Traversal
Published
26 November 2025
Modified
03 December 2025
CVSS Score v4 7.8
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0037 30th percentile
Risk Priority 42 floored blend · peak EPSS

Summary

CVE-2025-66254 is a high-severity External Control of File Name or Path (CWE-73) vulnerability in Dbbroadcast Mozart Next 100 Firmware. Its CVSS base score is 7.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Data from Local System (T1005); ranked at the 30th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) and AC-3 (Access Enforcement) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2025-66254 is an unauthenticated arbitrary file deletion vulnerability in the `deleteupgrade` parameter of `/var/www/upgrade_contents.php` within DB Electronica Telecomunicazioni S.p.A. Mozart FM Transmitter devices running versions 30, 50, 100, 300, 500, 1000, 2000, 3000, 3500, 6000, and 7000. The flaw lacks proper path sanitization or extension restrictions, allowing attackers to delete arbitrary files stored in the `/var/www/upload/` directory, including potentially critical system files. It has a CVSS v3.1 base score of 9.1 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H) and is associated with CWE-73 (External Control of File Name or Path).

A remote, unauthenticated attacker can exploit this vulnerability over the network with low complexity and no user interaction required. By sending a crafted request to the affected endpoint, the attacker can specify any file path within `/var/www/upload/` for deletion, potentially disrupting FM transmitter operations by removing essential configuration files, firmware updates, or other system components. This results in high integrity and availability impacts, though no confidentiality loss.

Advisories are available at https://www.abdulmhsblog.com/posts/webfmvulns/, which detail the vulnerability discovery but do not specify patches or mitigations in the provided information. Security practitioners should monitor for updates from DB Electronica Telecomunicazioni S.p.A. and restrict network access to the web interface.

OWASP Top 10 for Web (2025)

A06:2025 Insecure Design

EU & UK References

Vulnerability Data

Unauthenticated Arbitrary File Deletion (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 The deleteupgrade parameter allows unauthenticated deletion of arbitrary files. The…

more

`deleteupgrade` parameter in `/var/www/upgrade_contents.php` allows unauthenticated deletion of arbitrary files in `/var/www/upload/` without any extension restriction or path sanitization, enabling attackers to remove critical system files.

CWE(s)
CWE-73

Related Threats

MITRE ATT&CK Enterprise Techniques

T1005 Data from Local System Collection
Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.
attack.mitre.org →
T1083 File and Directory Discovery Discovery
Adversaries may enumerate files and directories or may search in specific locations of a host or network share for certain information within a file system.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1574.007 Path Interception by PATH Environment Variable Stealth
Adversaries may execute their own malicious payloads by hijacking environment variables used to load libraries.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-66257Same product: Dbbroadcast Mozart Dds Next 100
CVE-2025-66262Same product: Dbbroadcast Mozart Dds Next 100
CVE-2025-66260Same product: Dbbroadcast Mozart Dds Next 100
CVE-2025-66263Same product: Dbbroadcast Mozart Dds Next 100
CVE-2025-66251Same product: Dbbroadcast Mozart Dds Next 100
CVE-2025-63228Same product: Dbbroadcast Mozart Dds Next 100
CVE-2025-66253Same product: Dbbroadcast Mozart Dds Next 100
CVE-2025-66250Same product: Dbbroadcast Mozart Dds Next 100
CVE-2025-63229Same product: Dbbroadcast Mozart Dds Next 100
CVE-2025-66256Same product: Dbbroadcast Mozart Dds Next 100

Affected Assets

dbbroadcast
mozart next 100 firmware
all versions
dbbroadcast
mozart next 1000 firmware
all versions
dbbroadcast
mozart next 2000 firmware
all versions
dbbroadcast
mozart next 30 firmware
all versions
dbbroadcast
mozart next 300 firmware
all versions
dbbroadcast
mozart next 3000 firmware
all versions
dbbroadcast
mozart next 3500 firmware
all versions
dbbroadcast
mozart next 50 firmware
all versions
dbbroadcast
mozart next 500 firmware
all versions
dbbroadcast
mozart next 6000 firmware
all versions
+12 more product configuration(s) — see NVD for full list

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V5.3.2

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

Input validation directly rejects or sanitizes untrusted path strings before they reach filesystem operations.

AC-3 Access Enforcement partial match

Enforces authorization checks on the actual resource accessed, blocking unauthorized files even when a malicious path is supplied.

AC-6 Least Privilege partial match

Least-privilege limits the set of files or directories any subject can affect, shrinking the blast radius of a path-control flaw.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 full match
prevents

Secure SDLC practices include input validation and path sanitization that eliminate this weakness.

PR.AA-05 mostly match
prevents

Least-privilege file authorization directly limits damage from externally controlled paths.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect path-traversal issues but does not itself implement preventive controls.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle mandates input validation and path-handling controls that directly prevent external file/path manipulation.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for controls against untrusted input influencing file operations.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles discourage unsafe path construction but do not prescribe concrete file-name controls.

A.8.28 Secure coding partial match
prevents

Secure coding standards require canonicalization, allow-listing, and bounds checks on file paths, directly eliminating CWE-73.

A.8.3 Information access restriction partial match
mitigates

Information access restriction limits which files can be reached, indirectly reducing impact of path manipulation.

References