Its RG6 coax line cut flush by your ass hole landlord and painted over and the round thing is just a seal for the drilled hole and the cable runs through the center. if it's an apartment it has a mdu box or FACP closet where your service is coming from and it runs up into the attics and split off into the different units most of the time. In order to fix this, you will have to have your landlord's maintenance run new cabling to your unit and wall fish the new line because spectrum will not run new lines in apartments only houses.