This indicates an attack attempt against a Buffer Overflow vulnerability in XiongMai HTTP Server.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application when handling a malicious request. A remote attacker may be able to exploit this to launch DoS attack against affected products via a crafted request.
XiongMai uc-httpd 1.0.0
Denial of Service: Remote attackers can crash vulnerable systems
Currently we are unaware of any vendor supplied patch for this issue