CVE-2026-22550 is an OS command injection vulnerability identified in ELECOM CO.,LTD.'s wireless router models WRC-X1500GS-B and WRC-X1500GSA-B, specifically affecting firmware versions 1.12 and earlier. The vulnerability arises from improper neutralization of special elements in user-supplied input within the device's web interface or management functions, allowing a logged-in user to craft malicious requests that execute arbitrary operating system commands. This flaw enables an attacker with authenticated access to escalate privileges and potentially take full control of the device, compromising its confidentiality, integrity, and availability. The vulnerability is remotely exploitable over the network without requiring user interaction, but it does require prior authentication, which limits exposure to some extent. The CVSS v3.0 base score of 7.2 reflects a high severity due to network attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. No public exploits or patches are currently documented, but the risk remains significant given the critical role of these devices in network infrastructure. The vulnerability could be leveraged to disrupt network operations, intercept or manipulate traffic, or pivot to internal networks for further attacks.

For European organizations, exploitation of CVE-2026-22550 could lead to severe operational disruptions, including unauthorized control over network devices, interception or manipulation of sensitive data, and potential lateral movement within corporate networks. The compromise of these routers could undermine network security, leading to data breaches or denial of service conditions. Given the high severity and the critical role of routers in enterprise and industrial environments, affected organizations may face significant downtime, regulatory compliance issues, and reputational damage. The requirement for authenticated access reduces the risk from external attackers but increases the threat from insider threats or compromised credentials. Organizations relying on these devices for critical communications or in industrial control systems are particularly at risk, as attackers could disrupt essential services or cause cascading failures.

Organizations should immediately inventory their network devices to identify any WRC-X1500GS-B or WRC-X1500GSA-B models running vulnerable firmware versions (1.12 or earlier). They should monitor ELECOM's official channels for firmware updates and apply patches as soon as they become available. Until patches are released, restrict administrative access to these devices by implementing network segmentation, allowing management only from trusted internal networks or via VPN with multi-factor authentication. Employ strong password policies and monitor logs for unusual administrative activity to detect potential exploitation attempts. Consider deploying intrusion detection systems capable of recognizing anomalous command injection patterns targeting these devices. Additionally, conduct regular security audits and penetration testing focused on router management interfaces to identify and remediate similar vulnerabilities proactively.