CVE-2025-56102 is a critical OS Command Injection vulnerability identified in the Ruijie RG-EW1800GX router, specifically in the B11P226_EW1800GX_10223121 firmware version. The flaw resides in the module_get function within the /usr/local/lua/dev_sta/networkConnect.lua file, which processes POST requests. An attacker can craft a malicious POST request that injects arbitrary operating system commands, which the device executes with the privileges of the affected service. This vulnerability allows remote code execution without requiring authentication or user interaction, making it highly exploitable. The absence of a CVSS score suggests it is a newly disclosed issue, but the nature of OS command injection on network infrastructure devices typically results in severe consequences, including full device compromise, network reconnaissance, and pivoting attacks. No patches or known exploits are currently reported, but the vulnerability's presence in a widely deployed router model used in enterprise and service provider environments raises significant concern. The attack surface includes any exposed management interfaces or internal network segments where the device is reachable. The vulnerability could lead to unauthorized access, data exfiltration, disruption of network services, and potentially serve as a foothold for further attacks within organizational networks.

For European organizations, exploitation of this vulnerability could lead to severe operational disruptions and data breaches. Compromise of the Ruijie RG-EW1800GX routers can result in unauthorized network access, interception or manipulation of traffic, and potential lateral movement to other critical systems. Confidentiality is at risk due to possible data interception or exfiltration. Integrity can be compromised by altering device configurations or injecting malicious payloads into network traffic. Availability may be affected if attackers disrupt routing or network connectivity. Given the router's role in enterprise and service provider networks, exploitation could impact multiple departments or customers, amplifying the damage. The lack of authentication requirement increases the risk of remote exploitation, especially if management interfaces are exposed to untrusted networks. European organizations relying on Ruijie equipment for critical infrastructure or sensitive communications face heightened risk, necessitating urgent mitigation efforts.

Organizations should immediately audit their network to identify the presence of Ruijie RG-EW1800GX devices and restrict access to their management interfaces, ideally limiting them to trusted internal networks or VPNs. Network segmentation should be enforced to isolate these devices from untrusted zones. Monitoring network traffic for unusual POST requests targeting the module_get function can help detect exploitation attempts. Since no official patches are currently available, organizations should engage with Ruijie support for firmware updates or advisories. Applying strict input validation and firewall rules to block malformed requests can reduce exposure. Implementing intrusion detection/prevention systems (IDS/IPS) with signatures for command injection attempts is recommended. Regularly updating device firmware once patches are released is critical. Additionally, organizations should prepare incident response plans to quickly contain and remediate any compromise stemming from this vulnerability.