CVE-2025-71023 affects Tenda AX-3 router firmware version 16.03.12.10_CN with a stack overflow vulnerability in the fromAdvSetMacMtuWan function. The vulnerability is located in the mac2 parameter and allows attackers to cause a Denial of Service (DoS) through crafted requests. This is a buffer overflow vulnerability that could potentially be exploited remotely. The vulnerability affects network infrastructure equipment, making it particularly concerning for network security. The issue has been documented with proof-of-concept details available on GitHub.