CVE-2026-3699 in HiPER 810G
Summary
by MITRE • 03/08/2026
A security flaw has been discovered in UTT HiPER 810G up to 1.7.7-171114. This impacts the function strcpy of the file /goform/formRemoteControl. The manipulation results in buffer overflow. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks.
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Analysis
by VulDB Data Team • 03/12/2026
The vulnerability identified as CVE-2026-3699 represents a critical buffer overflow flaw in the UTT HiPER 810G network device firmware version 1.7.7-171114 and earlier. This security weakness resides within the strcpy function implementation in the /goform/formRemoteControl file, which serves as a remote control interface for device management operations. The flaw stems from improper input validation and memory handling practices that fail to enforce bounds checking on user-supplied data, creating an exploitable condition that allows attackers to overwrite adjacent memory locations. The vulnerability's presence in a remote control interface makes it particularly dangerous as it can be triggered through network-based attacks without requiring physical access to the device.
The technical exploitation of this buffer overflow vulnerability follows established patterns that align with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking permits memory corruption. Attackers can craft malicious input payloads that exceed the allocated buffer size in the strcpy function, causing data to overwrite adjacent memory locations including return addresses, function pointers, or other critical control structures. This memory corruption can lead to arbitrary code execution, system crashes, or complete device compromise. The remote attack vector eliminates the need for physical presence and enables exploitation from any network location capable of reaching the device's management interface, making it particularly attractive to threat actors. The public availability of exploitation tools further amplifies the risk profile of this vulnerability.
The operational impact of CVE-2026-3699 extends beyond immediate device compromise to encompass broader network security implications. Successful exploitation can enable attackers to gain unauthorized administrative access to the UTT HiPER 810G device, potentially allowing them to modify network configurations, intercept traffic, or establish persistent access points within the network infrastructure. The remote nature of the attack means that organizations may not immediately detect compromise, as the malicious activity could occur without generating obvious network alerts. This vulnerability also represents a significant risk to industrial control systems and networked security devices where such equipment may serve as entry points for lateral movement attacks, aligning with ATT&CK technique T1071.004 for application layer protocol usage and T1059.001 for command and scripting interpreter execution. The device's role in remote control functionality makes it a valuable target for attackers seeking to maintain persistent access or establish command and control channels within network environments.
Organizations affected by this vulnerability should prioritize immediate remediation through firmware updates provided by UTT, as this represents a critical security risk that can be exploited without user interaction. Network segmentation and access control measures should be implemented to limit exposure of affected devices to untrusted networks, while monitoring systems should be enhanced to detect anomalous traffic patterns associated with exploitation attempts. Security teams should conduct comprehensive vulnerability assessments to identify all instances of the affected firmware versions within their network infrastructure and implement network-based intrusion detection rules specifically targeting exploitation patterns for this vulnerability. The public release of exploitation tools necessitates proactive defensive measures including disabling unnecessary remote management interfaces and implementing strong authentication controls to reduce the attack surface. Regular security audits and vulnerability management processes should be enhanced to prevent similar issues in future deployments, with particular attention to secure coding practices that prevent buffer overflow conditions through the use of safer string handling functions and proper input validation mechanisms.