"A malicious campaign known as 'Eternal Silence' is abusing Universal Plug and Play (UPnP) turns your router into a proxy server used to launch malicious attacks while hiding the location of the threat actors."

"UPnP is a connectivity protocol optionally available in most modern routers that allows other devices on a network to create port forwarding rules on a router automatically. This allows remote devices to access a particular software feature or device as necessary, with little configuration required by a user."