CVE-2025-26063 is a critical vulnerability identified in Intelbras RX1500 version 2.2.9 and RX3000 version 1.0.11 devices. The flaw stems from improper input validation of the ESSID name field when creating a wireless network. An attacker can craft a malicious ESSID payload that, when processed by the device, triggers arbitrary code execution without requiring authentication or user interaction. This vulnerability is categorized under CWE-77, indicating a command injection weakness. The attack vector is network-based (AV:N), with low attack complexity (AC:L), no privileges required (PR:N), and no user interaction (UI:N), resulting in a CVSS v3.1 base score of 9.8, denoting critical severity. Exploitation could allow attackers to fully compromise the device, leading to data theft, network disruption, or pivoting to internal networks. Although no public exploits have been reported yet, the vulnerability's nature and ease of exploitation make it a high-risk threat. Intelbras devices are commonly used in small to medium enterprise and residential environments, often in Latin America and some European markets. The lack of available patches at the time of disclosure necessitates immediate defensive measures to mitigate risk.

For European organizations, exploitation of CVE-2025-26063 could result in complete compromise of affected Intelbras devices, leading to unauthorized access to internal networks, data exfiltration, and disruption of network services. The vulnerability threatens confidentiality by enabling attackers to access sensitive information, integrity by allowing modification of device configurations or network traffic, and availability by potentially causing device crashes or denial of service. Given the devices' role as network access points or routers, attackers could use compromised devices as footholds to launch further attacks within corporate or residential networks. This is particularly concerning for organizations relying on Intelbras hardware for critical communications or in environments with limited network segmentation. The absence of authentication and user interaction requirements lowers the barrier for attackers, increasing the likelihood of exploitation if devices are exposed to untrusted networks.

1. Immediately restrict access to Intelbras RX1500 and RX3000 device management interfaces by implementing network segmentation and firewall rules to limit exposure to untrusted networks. 2. Monitor wireless network configurations for unusual or suspicious ESSID names that could indicate attempted exploitation. 3. Disable automatic network creation features if possible or enforce strict input validation policies on ESSID names. 4. Engage with Intelbras support channels to obtain and apply security patches or firmware updates as soon as they become available. 5. Employ network intrusion detection systems (NIDS) capable of detecting anomalous wireless management frames or command injection attempts. 6. Conduct regular security audits and vulnerability assessments on network infrastructure to identify and remediate vulnerable devices. 7. Educate network administrators about this vulnerability and the importance of promptly applying mitigations.