CVE-2025-50755 is a command injection vulnerability identified in the Wavlink WN535K3 device firmware version 20191010. The vulnerability exists in the set_sys_cmd function, which processes a command parameter. An attacker can exploit this flaw by sending a specially crafted request that injects arbitrary commands into the system. This allows the attacker to execute arbitrary code with the privileges of the affected device, potentially leading to full compromise of the device. Command injection vulnerabilities are critical because they allow attackers to bypass normal input validation and execute system-level commands, which can lead to unauthorized access, data exfiltration, or disruption of services. The vulnerability does not currently have an assigned CVSS score, and no public exploits have been reported in the wild as of the publication date. However, the nature of the vulnerability suggests a high risk if exploited. The affected product, Wavlink WN535K3, is a network device, likely a router or similar networking hardware, which is commonly deployed in both consumer and enterprise environments. The lack of patch information indicates that mitigation may require vendor intervention or manual configuration changes to limit exposure.

For European organizations, the impact of this vulnerability could be significant, especially for those relying on Wavlink WN535K3 devices within their network infrastructure. Successful exploitation could lead to unauthorized control over network devices, enabling attackers to intercept, manipulate, or disrupt network traffic. This could compromise the confidentiality and integrity of sensitive data transmitted across the network. Additionally, attackers could use compromised devices as footholds to pivot into internal networks, escalating attacks against critical systems. The availability of network services could also be affected if attackers execute disruptive commands. Given the interconnected nature of European networks and the importance of secure communications for regulatory compliance (e.g., GDPR), exploitation could result in legal and reputational consequences. The absence of known exploits currently reduces immediate risk, but the vulnerability's presence in network infrastructure devices makes it a high-priority concern for security teams.

1. Immediate network segmentation: Isolate Wavlink WN535K3 devices from critical network segments to limit potential lateral movement in case of compromise. 2. Restrict management access: Limit access to device management interfaces to trusted IP addresses and use secure channels (e.g., VPN, SSH) to prevent unauthorized command injection attempts. 3. Input validation and filtering: Where possible, implement network-level filtering to detect and block suspicious requests targeting the set_sys_cmd function or similar endpoints. 4. Monitor device logs and network traffic for unusual command execution or anomalies that could indicate exploitation attempts. 5. Engage with Wavlink for firmware updates or patches addressing this vulnerability; if unavailable, consider replacing affected devices with more secure alternatives. 6. Conduct regular vulnerability assessments and penetration testing focusing on network devices to identify and remediate similar issues proactively. 7. Educate network administrators on the risks of command injection and best practices for secure device configuration.