Hey boss lets secure this system. We need to do these 10 things. Sure thing... How long will it take and will it get in the way of these 4 features we promise

Hey boss lets secure this system. We need to do these 10 things. Sure thing... How long will it take and will it get in the way of these 4 features we promised to the customer that they wanted last week? Probably like about a month of work. Well add it to the backlog and we will get to it eventually.