CVE-2026-75877 in TV-IP751WIC
Summary
by MITRE • 08/18/2026
A flaw has been found in TRENDnet TV-IP751WIC 11.03.03. This vulnerability affects the function SystemNetworkChanged/SystemDDNSChanged/SystemEmailChanged/SystemFTPChanged/websCheckRealm/FUN_00432574/FUN_0043372C of the component alphapd. Executing a manipulation can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 08/18/2026
The TRENDnet TV-IP751WIC network camera, specifically running firmware version 11.03.03, contains a critical security flaw within its embedded web server daemon known as alphapd. This vulnerability is located in several specific functions including SystemNetworkChanged, SystemDDNSChanged, SystemEmailChanged, SystemFTPChanged, websCheckRealm, FUN_00432574, and FUN_0043372C. These functions are responsible for handling configuration changes related to network settings, dynamic DNS updates, email notifications, FTP server configurations, and realm authentication checks. The core technical issue is a stack-based buffer overflow that occurs when these functions process input data without adequate bounds checking or validation. When an attacker supplies specially crafted input strings that exceed the allocated memory space on the call stack, it overwrites adjacent memory locations, potentially corrupting critical program state information such as return addresses and saved frame pointers.
This type of vulnerability is classified under CWE-121, which denotes a stack-based buffer overflow. The presence of this flaw allows for remote code execution because an attacker can manipulate the overwritten data to redirect the instruction pointer to malicious shellcode injected into the same memory space or to existing executable segments within the process. Since the alphapd service typically runs with elevated privileges on embedded Linux devices, successful exploitation grants the attacker full control over the compromised device. The operational impact is severe as it enables unauthorized access to sensitive video feeds, potential pivoting into internal networks through the camera's network interfaces, and the establishment of persistent backdoors for further malicious activities such as botnet recruitment or espionage.
The vulnerability is remotely exploitable without requiring any form of authentication prior to triggering the overflow in certain configuration change endpoints, although some functions may require valid credentials depending on the specific implementation details of the firmware version. The fact that public exploits have been published significantly lowers the barrier for entry, allowing less sophisticated threat actors to compromise these devices. This aligns with MITRE ATT&CK techniques related to Initial Access via Exploitation of Remote Services and Execution through Command and Scripting Interpreter if shellcode is deployed effectively. Attackers can leverage this flaw to gain persistent access by modifying system configurations or installing additional malware payloads, thereby turning the compromised camera into a node within larger distributed networks used for DDoS attacks or data exfiltration.
Mitigation strategies must focus on immediate isolation and patch management. Organizations should immediately update the firmware of all TRENDnet TV-IP751WIC devices to the latest version provided by the vendor, which includes fixes for these buffer overflow issues in the alphapd component. If updating is not immediately feasible, network segmentation should be implemented to restrict access to the camera's management interface from untrusted networks or internet-facing zones. Additionally, disabling unnecessary services such as FTP and remote web administration can reduce the attack surface. Monitoring network traffic for anomalous HTTP requests containing unusually long parameters directed at these specific endpoints may help in detecting attempted exploitation activities before successful compromise occurs. Regular vulnerability assessments and penetration testing are recommended to identify similar weaknesses across other embedded IoT devices within the infrastructure.