CVE-2025-56084 is an operating system command injection vulnerability identified in the Ruijie RG-EW1800GX PRO router firmware version B11P226_EW1800GX-PRO_10223117. The flaw exists in the module_set function located in the Lua script file /usr/local/lua/dev_sta/nbr_cwmp.lua, which handles POST requests. An attacker can craft a malicious POST request targeting this endpoint to inject and execute arbitrary OS commands on the underlying system. This type of vulnerability allows attackers to gain unauthorized control over the device, potentially leading to full compromise. The vulnerability does not require authentication, making it remotely exploitable by unauthenticated attackers. Although no public exploits or patches are currently available, the vulnerability's presence in network infrastructure devices such as routers poses a significant risk. The attack vector involves sending specially crafted HTTP POST requests, which could be automated and launched at scale. The lack of a CVSS score suggests the vulnerability is newly disclosed, but the technical details indicate a critical weakness in input validation and command execution handling within the device firmware.

For European organizations, exploitation of CVE-2025-56084 could lead to severe consequences. Successful attacks may result in unauthorized remote code execution on critical network devices, enabling attackers to intercept, modify, or disrupt network traffic. This can compromise the confidentiality and integrity of sensitive data traversing the network. Additionally, attackers could use the compromised routers as footholds to pivot into internal networks, escalating privileges and compromising other systems. The availability of network services could also be impacted if attackers disrupt router functionality or launch denial-of-service conditions. Organizations in sectors such as telecommunications, finance, government, and critical infrastructure that rely on Ruijie RG-EW1800GX PRO routers are particularly vulnerable. The lack of authentication requirement and remote exploitability increase the risk of widespread attacks, potentially affecting supply chains and service continuity across Europe.

1. Immediate coordination with Ruijie Networks to obtain and apply any available firmware updates or patches addressing this vulnerability is critical. 2. In the absence of patches, implement network-level controls such as web application firewalls (WAFs) or intrusion prevention systems (IPS) to detect and block malicious POST requests targeting the vulnerable module_set endpoint. 3. Restrict management interfaces of affected routers to trusted internal networks and disable remote management where possible to reduce exposure. 4. Monitor network traffic for unusual POST requests or command execution patterns indicative of exploitation attempts. 5. Conduct thorough audits of affected devices to detect signs of compromise and unauthorized command execution. 6. Employ network segmentation to limit the impact of a compromised router on broader organizational infrastructure. 7. Educate network administrators on the vulnerability and recommended response procedures to ensure rapid detection and remediation.