CVE-2024-48440 is a command injection vulnerability identified in the Shenzhen Tuoshi Network Communications Co., Ltd 5G CPE Router NR500-EA RG500UEAABxCOMSLICv3.2.2543.12.18 firmware. The vulnerability resides in the at_command.asp web component, which processes input in a way that allows attackers to inject and execute arbitrary system commands remotely. The flaw does not require any authentication or user interaction, making it highly exploitable over the network. The CVSS 3.1 base score of 8.8 reflects the ease of exploitation (attack vector: adjacent network), low attack complexity, no privileges required, and no user interaction needed. Successful exploitation can lead to full compromise of the router, allowing attackers to manipulate network traffic, intercept sensitive data, disrupt services, or use the device as a foothold for further attacks. The vulnerability is categorized under CWE-77 (Improper Neutralization of Special Elements used in a Command), indicating a failure to properly sanitize user input before command execution. Currently, there are no known public exploits or patches available, increasing the urgency for organizations to implement interim protective measures. The affected device is a 5G Customer Premises Equipment (CPE) router, which is critical for providing 5G connectivity to end users and enterprises, making this vulnerability particularly impactful in telecommunications and enterprise environments.

The impact of CVE-2024-48440 is significant for organizations relying on Shenzhen Tuoshi 5G CPE routers. Exploitation can lead to complete device takeover, enabling attackers to execute arbitrary commands with system-level privileges. This compromises confidentiality by exposing sensitive network data, integrity by allowing manipulation or disruption of network traffic, and availability by potentially causing denial-of-service conditions. Attackers could pivot from the compromised router to internal networks, escalating the threat to connected systems and data. Telecommunications providers, enterprises using these routers for 5G connectivity, and critical infrastructure relying on these devices face elevated risks. The lack of authentication and user interaction requirements lowers the barrier for attackers, increasing the likelihood of exploitation in adjacent network environments. The absence of patches means the vulnerability remains open, potentially inviting targeted attacks once exploit code is developed.

1. Immediately isolate affected Shenzhen Tuoshi NR500-EA routers from critical network segments to limit exposure. 2. Monitor network traffic for unusual command execution patterns or unexpected outbound connections originating from these devices. 3. Restrict access to the router management interfaces, especially the at_command.asp endpoint, using network segmentation and firewall rules. 4. Disable or restrict remote management features if not required. 5. Implement strict input validation and filtering at network boundaries to prevent injection attempts. 6. Engage with Shenzhen Tuoshi Network Communications for official patches or firmware updates and prioritize their deployment once available. 7. Conduct regular security audits and vulnerability scans on network devices to detect similar issues. 8. Educate network administrators about this vulnerability and ensure incident response plans include steps for potential exploitation scenarios. 9. Consider deploying intrusion detection/prevention systems (IDS/IPS) tuned to detect command injection attempts targeting this router model.