This indicates detection of a Security Bypass vulnerability in Netcore/Netis Devices.
The vulnerability is due to a single hard-coded password in the router's firmware. Remote attackers can obtain access to the device with this password by sending a special request to a specified UDP port.
This vulnerability has been incorporated into various vulnerability scanners with widespread usage at the moment. If the signature is triggering in your network, this can also mean that your network is being scanned by vulnerability scanners.
All Netcore/Netis routers
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch or updates available for this issue.
Monitor the traffic from that network for any suspicious activity.