CVE-2024-51311 in TX9
Summary
by MITRE • 07/21/2026
The Tenda TX9 V22.03.02.05 firmware has a stack overflow vulnerability in the sub_4418CC function of the file /goform/SetNetControlList.
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Analysis
by VulDB Data Team • 07/21/2026
The Tenda TX9 router running firmware version V22.03.02.05 contains a critical stack overflow vulnerability within the sub_4418CC function located in the /goform/SetNetControlList file. This vulnerability represents a fundamental flaw in the router's web interface handling mechanism that processes network control list configuration requests. The stack overflow occurs when the device processes malformed input data through the SetNetControlList API endpoint, which is typically used for managing network access controls and firewall rules. The vulnerability stems from inadequate input validation and buffer management within the embedded software architecture, creating an exploitable condition that allows attackers to overwrite adjacent memory locations on the stack.
This technical flaw falls under the CWE-121 stack-based buffer overflow category, where insufficient bounds checking permits data to be written beyond the allocated buffer space. The vulnerability is particularly concerning because it exists within the administrative interface of a network device, providing potential attackers with elevated privileges and system control capabilities. Attackers can exploit this issue by sending specially crafted HTTP requests containing malicious input to the /goform/SetNetControlList endpoint, which triggers the vulnerable sub_4418CC function. The stack overflow can lead to arbitrary code execution, system crashes, or complete device compromise.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it provides attackers with potential paths for lateral movement within networks and persistent access to critical infrastructure. Network administrators who rely on Tenda TX9 routers for network control and security policies face significant risks when this vulnerability remains unpatched. The attack surface is particularly dangerous because the vulnerability can be exploited remotely without authentication, making it a prime target for automated exploitation campaigns targeting enterprise and residential networks. This weakness directly violates security best practices outlined in the NIST cybersecurity framework and represents a critical risk to network availability and integrity.
Mitigation strategies should prioritize immediate firmware updates from Tenda to address the identified stack overflow vulnerability through proper input validation and buffer management. Network segmentation and access control measures can help limit potential exploitation impact while patches are deployed, though these represent temporary workarounds rather than permanent solutions. Security teams should implement monitoring for suspicious requests to the SetNetControlList endpoint and consider disabling unnecessary administrative interfaces when possible. The vulnerability aligns with ATT&CK technique T1059.007 for command and script interpreter execution through web shell exploitation, emphasizing the need for comprehensive network security controls and regular firmware updates to prevent exploitation attempts that could lead to complete network compromise.