This indicates an attack attempt to exploit an improper authentication vulnerability in FiberHome Routers.
An attacker can exploit this vulnerability to restore the router to its factory settings which could allow the attacker to login by using default username/password.
FiberHome User End Routers Bearing Model Number AN1020-25
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently, we are unaware of any vendor supplied patch for this issue.