CVE-2026-2981 is a buffer overflow vulnerability identified in the UTT HiPER 810G device firmware versions up to 1.7.7-1711. The vulnerability stems from unsafe use of the strcpy function in the /goform/formTaskEdit_ap endpoint, specifically when processing the txtMin2 parameter. Because strcpy does not perform bounds checking, an attacker can supply an overly long input to overflow the buffer, potentially overwriting adjacent memory. This can lead to arbitrary code execution, privilege escalation, or denial of service conditions. The vulnerability is remotely exploitable over the network without requiring authentication or user interaction, making it highly dangerous. The CVSS 4.0 score of 8.7 reflects the ease of exploitation and the severe impact on confidentiality, integrity, and availability. Although no patches have been released, the exploit code is publicly available, increasing the likelihood of active exploitation. The vulnerability affects all devices running the specified firmware version or earlier, and the lack of segmentation or mitigation in the affected code amplifies the risk. Organizations using UTT HiPER 810G devices should consider this a critical security issue requiring immediate attention.

The impact of CVE-2026-2981 is significant for organizations deploying UTT HiPER 810G devices, especially in environments where these devices control or monitor critical infrastructure or sensitive operations. Successful exploitation can lead to full system compromise, allowing attackers to execute arbitrary code remotely, potentially leading to data breaches, disruption of services, or lateral movement within networks. The vulnerability threatens confidentiality by exposing sensitive data, integrity by enabling unauthorized modifications, and availability by causing device crashes or denial of service. Given the remote, unauthenticated exploit vector and public availability of exploit code, the threat is elevated globally. Organizations relying on these devices in industrial, telecommunications, or enterprise networks face increased risk of targeted attacks or opportunistic exploitation by cybercriminals or state-sponsored actors. The absence of an official patch further exacerbates the threat landscape, making mitigation and monitoring critical.

1. Immediately restrict network access to the UTT HiPER 810G devices, especially blocking access to the /goform/formTaskEdit_ap endpoint from untrusted networks. 2. Implement strict firewall rules and network segmentation to isolate affected devices from the internet and less trusted network segments. 3. Monitor network traffic and device logs for unusual or malformed requests targeting the txtMin2 parameter or the vulnerable endpoint. 4. Employ intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics to detect exploitation attempts. 5. Contact UTT vendor support for any available patches, firmware updates, or official mitigation guidance and apply them promptly once available. 6. If possible, disable or limit the functionality of the vulnerable endpoint until a patch is released. 7. Conduct thorough security assessments and penetration tests on the affected devices to identify any signs of compromise. 8. Maintain up-to-date backups and incident response plans tailored to potential device compromise scenarios. 9. Educate network administrators and security teams about this vulnerability and the importance of rapid response. 10. Consider deploying application-layer gateways or web application firewalls (WAFs) to filter malicious payloads targeting the vulnerable function.