External risk intelligence

R.V.R. Elettronica TEX Firmware Password Change Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2025-63207

The affected products are industrial broadcast transmitters with integrated Web GUIs designed for management. These types of appliance interfaces are frequently deployed with remote access enabled for monitoring and configuration purposes, making them commonly reachable as managed edge services or administrative portals.

Authentication Bypass

Rvr Tex30lcd\/s Firmware

texl-000400

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory concerns a critical security flaw in R.V.R Elettronica TEX products, specifically affecting their web interface. The vulnerability allows unauthorized individuals to change system passwords, potentially leading to complete control of the affected devices. The main concern is to confirm if these products are in use and, if so, to understand the potential exposure.

Unauthenticated access can change system passwords.
Critical flaw impacts device control and security.
Confirm relevance and assess exposure.

Attack Path

How an attacker could exploit the issue

An attacker can reach the vulnerable R.V.R Elettronica TEX device over the network, requiring no prior authentication or special conditions. By sending a crafted request to a specific web interface endpoint, an attacker can bypass access controls and modify critical system passwords. This can lead to unauthorized control and complete compromise of the affected device.

No authentication needed for access.
Triggered by unauthenticated POST request.
Results in full system compromise.

Live Threat

Current exploitation, exposure, and threat context

The R.V.R Elettronica TEX product's web interface could allow an unauthenticated attacker to change administrative, operator, and user passwords. This could lead to a complete compromise of the system when the affected web GUI is exposed to an attacker.

System passwords and configuration.
Unauthenticated POST request to password endpoint.
Complete system compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

The R.V.R. Elettronica TEX product's Web GUI is vulnerable to broken access control, allowing unauthenticated attackers to change administrative passwords and gain full system control. This could impact the platform or infrastructure teams responsible for managing these devices, as well as security teams overseeing network exposure. The immediate practical step is to identify all instances of the affected product, determine their reachability and criticality, and then coordinate with the asset owners for remediation.

Platform/infrastructure owners are responsible.
Verify external reachability and business criticality.
Plan secure remote access and firmware updates.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is the R.V.R. Elettronica TEX product line?

The R.V.R. Elettronica TEX line consists of industrial-grade FM broadcast transmitters. These devices are used in radio infrastructure to generate and manage transmission signals. Each unit includes an integrated Web GUI, such as the TLAN-000400 interface, which allows technicians to remotely monitor and configure transmitter settings like frequency, power levels, and system access.

What is the vulnerability behind CVE-2025-63207?

This vulnerability is classified as Improper Authentication (CWE-287). It represents a failure in the device's access control mechanisms. Specifically, the web interface does not properly verify identity before allowing changes to account credentials. Because of this, an unauthorized user can interact with the system's management functions as if they were a legitimate administrator.

How can an attacker trigger this vulnerability?

The vulnerability is triggered by sending a specific, crafted HTTP POST request to the /_Passwd.html endpoint on the transmitter's web interface. Critically, the system does not require any prior authentication, password, or session token to process this request. Simply reaching this network endpoint is sufficient to initiate the command; standard read-only monitoring activities do not trigger this password change process.

Is my device relevant based on Halo Surface Signal?

Halo Surface Signal indicates that these transmitters are often deployed with remote access enabled, making their administrative Web GUIs reachable over the network. If your device is configured to be internet-facing or reachable across wide network segments rather than restricted to a local management LAN, it is considered to be at higher risk of unauthorized interaction.

How do I respond if I am running these transmitters?

First, perform an inventory to locate all TEX series units using firmware version TEXL-000400 in your environment. Assess whether these devices are exposed to untrusted networks. If they are, restrict access to the web interface immediately through network-level controls like firewalls or VPNs. Finally, coordinate with your infrastructure team to plan and apply necessary firmware updates to resolve the access control flaw.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.