CVE-2026-3016 is a buffer overflow vulnerability identified in the UTT HiPER 810G device firmware versions up to 1.7.7-171114. The vulnerability arises from unsafe use of the strcpy function in the /goform/formP2PLimitConfig handler, specifically in processing the 'except' argument. Since strcpy does not perform bounds checking, an attacker can supply an overly long input to overflow the buffer, corrupting adjacent memory. This memory corruption can be leveraged to execute arbitrary code remotely, without requiring authentication or user interaction. The vulnerability is remotely exploitable over the network, making it a critical risk for exposed devices. The CVSS 4.0 score of 8.7 reflects high impact on confidentiality, integrity, and availability, with low attack complexity and no privileges or user interaction required. While no active exploitation has been reported, a public exploit exists, increasing the likelihood of future attacks. The vulnerability affects network devices commonly used in enterprise and ISP environments, potentially allowing attackers to gain persistent control or disrupt network operations.

The impact of CVE-2026-3016 is significant for organizations deploying UTT HiPER 810G devices. Successful exploitation can lead to remote code execution, allowing attackers to take full control of the affected device. This compromises the confidentiality of network traffic and device configuration, integrity of network operations, and availability of network services. Attackers could use compromised devices as footholds for lateral movement, data exfiltration, or launching further attacks within the network. Disruption of critical network infrastructure could affect business continuity and cause reputational damage. Given the device’s role in networking, the vulnerability could also impact service providers and their customers, amplifying the scope of damage. The availability of a public exploit increases the urgency for remediation to prevent widespread exploitation.

1. Apply firmware updates from UTT as soon as they become available to address this vulnerability. 2. If patches are not yet available, restrict network access to the /goform/formP2PLimitConfig endpoint using firewall rules or access control lists to limit exposure. 3. Implement network segmentation to isolate vulnerable devices from critical infrastructure and sensitive data. 4. Monitor network traffic and device logs for unusual activity or attempts to exploit this vulnerability, using intrusion detection/prevention systems tuned for this CVE. 5. Disable or limit remote management interfaces if not required, reducing the attack surface. 6. Conduct regular security assessments and vulnerability scans on network devices to identify and remediate similar issues proactively. 7. Educate network administrators about this vulnerability and ensure incident response plans include steps for handling potential exploitation.