CVE-2026-92398 in RG-EW3000GX
Summary
by MITRE • 09/16/2026
A vulnerability was found in Ruijie RG-EW3000GX EW_3.0(1)B11P380. Affected by this issue is some unknown functionality of the file /etc/rg_config/admin of the component user_list_note Module. Performing a manipulation of the argument Name results in os command injection. It is possible to initiate the attack remotely. The exploit has been made public and could be used.
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Analysis
by VulDB Data Team • 09/16/2026
The vulnerability identified in Ruijie RG-EW3000GX routers running firmware version EW_3.0(1)B11P380 represents a critical security flaw within the user_list_note module, specifically affecting the handling of administrative configuration files located at /etc/rg_config/admin. This component is responsible for managing user lists and associated notes, which are integral to the router's access control mechanisms. The core technical deficiency lies in the insufficient sanitization of input data passed through the Name argument during processing operations. When an attacker provides a specially crafted string as the value for this parameter, the system fails to properly escape or validate special characters before passing them to underlying operating system commands. This lack of rigorous input validation allows malicious shell metacharacters to be interpreted directly by the host's command interpreter rather than being treated as literal data within the application logic.
This architectural weakness constitutes a classic OS Command Injection vulnerability, which is formally categorized under CWE-78 in the Common Weakness Enumeration standard. The flaw enables an attacker to execute arbitrary system commands with the privileges of the compromised service or user account running the vulnerable module. Given that this functionality resides within the administrative configuration handling subsystem, successful exploitation typically grants the attacker elevated access rights on the device's operating system. This level of control allows for complete compromise of the router's integrity, confidentiality, and availability. The attacker can modify routing tables, intercept network traffic, install persistent backdoors, or use the compromised router as a pivot point to attack other devices within the local network segment.
The operational impact of this vulnerability is severe due to its remote exploitability. Since the flaw exists in a module that processes user input potentially accessible over the network interface used for management, an unauthenticated attacker can initiate attacks from any location with connectivity to the router's administrative port or web interface. The fact that public exploits have been released significantly lowers the barrier to entry for malicious actors, increasing the likelihood of automated scanning and widespread exploitation across internet-facing devices running this specific firmware version. Attackers leveraging these tools can achieve remote code execution without needing prior authentication credentials in certain configurations where user list modifications are permitted or accessible through exposed endpoints.
From a threat intelligence perspective, this vulnerability aligns with ATT&CK techniques related to Command and Scripting Interpreter abuse (T1059) and potentially System Network Configuration Discovery if used for reconnaissance purposes. The ability to inject commands directly into the OS environment bypasses application-level security controls, making detection difficult without deep packet inspection or behavioral analysis of system calls. Organizations relying on this hardware must recognize that the exposure is not limited to local network attacks but extends to any remote access vector provided by the device's design.
Mitigation strategies should prioritize immediate firmware updates if a patched version is available from Ruijie Networks, as this addresses the root cause within the application code. In cases where patching is delayed or unavailable, administrators must implement strict network segmentation to isolate affected devices from critical infrastructure and sensitive data networks. Additionally, deploying web application firewalls with rules capable of detecting common OS command injection patterns can provide a layer of defense against exploitation attempts. Input validation should be enforced at the perimeter level by blocking requests containing suspicious shell characters such as semicolons, pipes, or backticks in administrative API calls if those endpoints are exposed externally. Regular auditing of router configurations and monitoring for unusual outbound connections from the device network interface can also aid in early detection of successful exploitation attempts.