CVE-2025-26062 is an access control vulnerability identified in Intelbras RX1500 version 2.2.9 and RX3000 version 1.0.11 routers. The flaw allows unauthenticated attackers to retrieve the router's settings file without any credentials or user interaction. This settings file likely contains sensitive information such as network configurations, passwords, and possibly VPN or firewall rules. The vulnerability stems from improper access control mechanisms (CWE-284), which fail to restrict access to critical configuration files. The CVSS v3.1 score of 9.8 reflects the high impact on confidentiality, integrity, and availability, combined with the ease of remote exploitation over the network (AV:N), no privileges required (PR:N), and no user interaction needed (UI:N). Although no public exploits have been reported yet, the exposure of router settings can enable attackers to manipulate network traffic, intercept communications, or pivot to internal systems. The lack of available patches at the time of publication increases the urgency for organizations to implement compensating controls. This vulnerability is particularly dangerous because routers serve as the network perimeter, and compromise can lead to widespread network infiltration.

For European organizations, exploitation of CVE-2025-26062 could result in severe consequences including unauthorized disclosure of sensitive network configurations, credential theft, and potential full network compromise. Attackers gaining access to router settings can alter firewall rules, redirect traffic, or disable security features, undermining the entire network's security posture. Critical infrastructure operators, enterprises, and government agencies relying on Intelbras RX1500 and RX3000 routers may face operational disruptions, data breaches, and compliance violations under GDPR. The exposure of sensitive configuration data could also facilitate further attacks such as man-in-the-middle, ransomware deployment, or espionage. Given the routers' role as network gateways, the vulnerability could be exploited to establish persistent footholds within organizational networks, increasing the risk of long-term compromise and data exfiltration.

Immediate mitigation steps include isolating affected Intelbras RX1500 and RX3000 routers from untrusted networks and restricting access to management interfaces to trusted internal IP addresses only. Network administrators should monitor router logs for unusual access attempts and implement network segmentation to limit potential lateral movement. Since no patches are currently available, organizations should engage with Intelbras support to obtain firmware updates or advisories. Employing strong network perimeter defenses such as firewalls and intrusion detection/prevention systems can help detect and block exploitation attempts. Additionally, organizations should conduct thorough audits of router configurations and credentials, changing default passwords and disabling unnecessary services. Planning for rapid deployment of firmware updates once released is critical. Finally, organizations should consider alternative hardware or vendors if timely patching is not feasible.