CVE-2026-9814 in Totolink
Summary
by MITRE • 10/21/2026
An OS command injection vulnerability exists in the boa formWizard newPass functionality of X2000R (version(s): TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). A specially crafted HTTP request can lead to arbitrary code execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.
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Analysis
by VulDB Data Team • 10/21/2026
The identified security flaw resides within the formWizard newPass functionality of the TOTOLINK-X2000R router, specifically affecting version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 and potentially other versions in the same product line that utilize similar embedded web server implementations. This vulnerability is classified as an OS command injection flaw, which represents a critical class of security defects where untrusted input is improperly concatenated into system commands without adequate sanitization or validation. In this specific context, the vulnerable component processes user-supplied data intended for password modification operations but fails to restrict special characters that hold significance in shell interpretation, such as semicolons, pipes, or backticks. This lack of rigorous input filtering allows an attacker to inject arbitrary operating system commands into the execution pipeline managed by the underlying web server, commonly identified as boa in embedded router firmware environments.
The operational impact of this vulnerability is severe due to its potential for remote code execution with elevated privileges. Since the vulnerable functionality typically runs within a privileged context on many IoT devices, successful exploitation grants an attacker full control over the affected device's operating system. This level of access enables malicious actors to perform a wide range of destructive actions, including installing persistent backdoors, exfiltrating sensitive network configuration data such as Wi-Fi credentials and ISP settings, pivoting into internal networks for lateral movement, or disrupting service availability by modifying critical system files. The requirement for authentication does not mitigate the risk significantly in many real-world scenarios where default credentials are still prevalent, or where session hijacking techniques can be employed to bypass initial access controls, thereby maintaining a high attack surface for adversaries targeting home and small business networking infrastructure.
From a technical classification perspective, this vulnerability aligns with CWE-78 Improper Neutralization of Special Elements used in an OS Command commonly known as OS Command Injection. The root cause lies in the application's failure to separate user input from command structure during the processing of the newPass form submission. Furthermore, within the context of cyber kill chain modeling and adversary tactics, this exploit maps directly to MITRE ATT&CK technique T1059 Command and Scripting Interpreter, specifically under sub-techniques involving shell commands like sh or bash which are standard in Linux-based embedded systems. The exploitation vector is classified as Network with Authentication requirements, indicating that while the attack can be launched remotely over HTTP, it necessitates valid credentials for the web interface of the router.
Mitigation strategies must address both immediate remediation and long-term security posture improvements. The primary corrective action involves applying vendor-provided firmware updates that patch this specific input validation gap by implementing strict allow-listing of permitted characters in password fields or utilizing parameterized command execution methods rather than string concatenation for system calls. In the absence of an immediate patch, administrators should enforce strong, unique passwords to reduce the risk of credential compromise and disable remote management features if they are not strictly necessary, thereby limiting exposure to external networks. Additionally, network segmentation can help contain potential damage by isolating IoT devices from critical internal assets, ensuring that even if a device is compromised through this command injection vector, it cannot easily pivot to more sensitive systems within the local area network.