CVE-2023-25231 in W30E
Summary
by MITRE • 02/27/2023
Tenda Router W30E V1.0.1.25(633) is vulnerable to Buffer Overflow in function fromRouteStatic via parameters entrys and mitInterface.
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Analysis
by VulDB Data Team • 10/29/2025
The vulnerability identified as CVE-2023-25231 affects the Tenda Router W30E model running firmware version V1.0.1.25(633) and represents a critical buffer overflow condition within the router's web interface management system. This flaw exists in the function named fromRouteStatic which processes incoming parameters through the entrys and mitInterface variables, creating an exploitable condition that could allow remote attackers to execute arbitrary code on the affected device. The vulnerability stems from inadequate input validation and bounds checking within the router's firmware implementation, specifically in how it handles user-supplied data through web-based administrative interfaces.
The technical nature of this buffer overflow vulnerability places it squarely within CWE-121, which describes buffer overflow conditions where insufficient bounds checking allows data to overwrite adjacent memory locations. This particular implementation flaw occurs when the router processes parameters passed through the web interface, specifically in the route static configuration handling functionality. Attackers can craft malicious input payloads that exceed the allocated buffer space, potentially overwriting critical memory segments including return addresses, function pointers, or other control data structures. The vulnerability's exploitation pathway involves sending specially crafted HTTP requests containing excessive data in the entrys and mitInterface parameters, which are then processed by the vulnerable fromRouteStatic function without proper sanitization or length validation.
From an operational perspective, this vulnerability presents a severe risk to network security as it allows for remote code execution on the affected router, potentially enabling attackers to gain full administrative control over the device. Once exploited, the attacker could modify router configurations, redirect traffic through malicious servers, establish persistent backdoors, or use the compromised device as a pivot point for further attacks within the local network. The impact extends beyond the individual device to potentially compromise the entire network infrastructure, as routers often serve as critical gateways and control points for network traffic. The vulnerability affects both the device's management interface and its operational functionality, making it particularly dangerous as it could be exploited to disrupt network services or create persistent access vectors.
Mitigation strategies for CVE-2023-25231 should prioritize immediate firmware updates from Tenda, as the vendor has likely released patches addressing this specific buffer overflow condition. Network administrators should implement network segmentation and access controls to limit exposure of affected devices to untrusted networks, while also monitoring for unusual network traffic patterns that might indicate exploitation attempts. The implementation of web application firewalls and intrusion detection systems can help detect and block malicious requests targeting the vulnerable parameters. Additionally, organizations should consider disabling unnecessary administrative interfaces and implementing strong authentication mechanisms to reduce the attack surface. According to ATT&CK framework category T1059, this vulnerability could be leveraged for command and control operations, while T1566 represents the initial access vector through the web interface. Regular security assessments and vulnerability scanning should be conducted to identify similar buffer overflow conditions in other network infrastructure devices, as this class of vulnerability is commonly found in embedded systems and network appliances.