A critical buffer overflow vulnerability in UTT HiPER 810G routers, triggered via the /goform/getOneApConfTempEntry endpoint, poses a significant risk of remote code execution or system instability.

The vulnerability exists due to improper boundary checks in the strcpy function within the /goform/getOneApConfTempEntry file. An authenticated attacker can send a crafted POST request containing an excessively long tempName parameter to induce a stack-based buffer overflow.

Successful exploitation allows an attacker to achieve memory corruption, which can lead to a complete denial of service or potential remote code execution on the affected routing hardware. Given the CVSS score of 8.8, this flaw represents a high-severity risk to network infrastructure availability and data integrity. Compromise of edge routing devices can facilitate further lateral movement within the internal network.

Immediate Action: Since a specific patch is not currently available, administrators should restrict network access to the management interface of the HiPER 810G router to trusted IP addresses only.

Proactive Monitoring: Monitor device logs for abnormal system crashes, reboots, or unexpected POST requests directed at the /goform/getOneApConfTempEntry endpoint.

Compensating Controls: Deploy a Web Application Firewall or an Access Control List (ACL) to block or sanitize incoming traffic to the management interface, specifically filtering long or malformed strings in form parameters.

Public Exploit Available: Yes, a proof-of-concept is documented in the researcher write-up at the provided GitHub repository.

Due to the presence of a published proof-of-concept and the high-severity nature of buffer overflow vulnerabilities in network hardware, immediate mitigation is required. Organizations should isolate the vulnerable management interface from the internet and monitor for any signs of exploitation until the vendor releases a firmware update. Prioritize the application of any forthcoming vendor security updates as soon as they become available.