CVE-2025-63207 identifies a severe broken access control vulnerability in the R.V.R Elettronica TEX product, specifically affecting firmware version TEXL-000400 and Web GUI version TLAN-000400. The vulnerability resides in the /_Passwd.html endpoint, which is responsible for password management of Admin, Operator, and User accounts. Due to improper authentication checks, an attacker can send unauthenticated HTTP POST requests directly to this endpoint to change any account password without needing valid credentials or user interaction. This lack of access control effectively allows an attacker to take full control over the device, leading to complete system compromise. The vulnerability is critical because it bypasses all authentication mechanisms, enabling privilege escalation and persistent unauthorized access. Although no CVSS score has been assigned and no public exploits are currently known, the impact is severe given the nature of the access gained. The absence of patches or mitigations from the vendor increases the urgency for defensive measures. The vulnerability affects all deployments running the specified firmware and web GUI versions, potentially including industrial, commercial, or critical infrastructure environments where these devices are deployed.

For European organizations, this vulnerability poses a significant threat to confidentiality, integrity, and availability. Attackers can gain full administrative control over affected devices, potentially leading to unauthorized data access, manipulation, or deletion. In critical infrastructure sectors such as energy, manufacturing, or transportation where R.V.R Elettronica TEX devices may be used, exploitation could disrupt operations or cause safety hazards. The ability to change passwords without authentication also facilitates persistent backdoors and lateral movement within networks. Given the lack of patches, organizations face prolonged exposure. The impact extends beyond individual devices to entire network segments if attackers leverage compromised devices as footholds. This could result in regulatory compliance violations under GDPR and other European cybersecurity frameworks, leading to legal and financial consequences. Overall, the threat undermines trust in device security and operational continuity.

Immediate mitigation should focus on network-level controls such as isolating affected devices from untrusted networks and restricting access to the /_Passwd.html endpoint via firewalls or access control lists. Organizations should implement strict network segmentation to limit exposure. Continuous monitoring and logging of HTTP POST requests targeting the vulnerable endpoint can help detect exploitation attempts. Employ intrusion detection/prevention systems (IDS/IPS) with custom signatures for anomalous password change requests. Engage with R.V.R Elettronica to obtain timelines for patches or firmware updates and prioritize their deployment once available. Until patches are released, consider disabling the web management interface if operationally feasible or replacing vulnerable devices with alternatives. Conduct thorough audits of device configurations and credentials to identify any unauthorized changes. Additionally, enhance overall network security posture by enforcing strong authentication and multi-factor authentication on management interfaces where possible.