CVE-2023-40902 in AC10
Summary
by MITRE • 08/24/2023
Tenda AC10 v4 US_AC10V4.0si_V16.03.10.13_cn was discovered to contain a stack overflow via parameter list and bindnum at /goform/SetIpMacBind.
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Analysis
by VulDB Data Team • 01/30/2026
The vulnerability identified as CVE-2023-40902 affects the Tenda AC10 v4 wireless router firmware version US_AC10V4.0si_V16.03.10.13_cn and represents a critical stack overflow condition within the web interface management functionality. This issue manifests in the /goform/SetIpMacBind endpoint which handles IP-MAC binding configuration parameters, making it a prime target for remote exploitation by attackers who can manipulate the parameter list and bindnum variables through HTTP requests. The stack overflow vulnerability occurs when the device fails to properly validate or sanitize user-supplied input parameters, allowing maliciously crafted data to overwrite adjacent memory locations on the stack. This specific flaw falls under the CWE-121 stack-based buffer overflow category, where insufficient bounds checking permits data to exceed allocated stack buffer boundaries and corrupt adjacent memory regions including return addresses and function parameters. The vulnerability is particularly concerning because it exists within the administrative web interface of a consumer-grade router, making it accessible to remote attackers without requiring physical access or authentication credentials.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it creates potential for remote code execution and complete system compromise. When exploited successfully, the stack overflow allows attackers to manipulate the program execution flow by overwriting the return address on the stack, potentially enabling arbitrary code execution with the privileges of the web server process. This represents a significant threat to network security since routers serve as central points of control and gateway functions within home and small office networks. Attackers could leverage this vulnerability to gain persistent access to affected networks, install backdoors, redirect traffic, or use the compromised device as a pivot point for attacking other systems within the local network. The vulnerability affects the device's ability to properly validate input parameters, particularly the bindnum field and parameter list, which are processed in the SetIpMacBind function without adequate bounds checking mechanisms. This flaw directly maps to attack techniques described in the MITRE ATT&CK framework under T1059 Command and Scripting Interpreter and T1071.004 Application Layer Protocol DNS, as the vulnerability enables remote command execution through web interface manipulation.
Mitigation strategies for CVE-2023-40902 should prioritize immediate firmware updates from Tenda to address the underlying stack overflow condition in the web management interface. Network administrators should implement network segmentation and firewall rules to restrict access to the router's administrative interface from untrusted networks, particularly blocking direct access to the /goform/SetIpMacBind endpoint. The vulnerability demonstrates the importance of input validation and proper buffer management in embedded web applications, highlighting the need for secure coding practices throughout the software development lifecycle. Organizations should conduct vulnerability assessments to identify other potentially affected Tenda devices running the same firmware version and ensure that all network devices are regularly updated with the latest security patches. The flaw also underscores the necessity of network monitoring and intrusion detection systems to detect anomalous traffic patterns that might indicate exploitation attempts against web interface endpoints. Additionally, implementing web application firewalls and input sanitization controls can provide additional layers of protection against similar buffer overflow vulnerabilities in the device's web interface components. The vulnerability serves as a reminder of the critical security considerations required for embedded network devices and the importance of maintaining up-to-date firmware to protect against known exploits that could compromise network infrastructure.