If you've got an old Asus router, you might want to check whether it's needing a firmware update. Asus has just reported that three of its older DSL modem routers have a critical vulnerability, an "authentication bypass vulnerability" that "may allow remote attackers to gain unauthorized access into the affected system."
Asus hasn't just dropped that bombshell and left the room, though; there's a firmware update you can install to patch the vulnerability. The affected models are the DSL-AC51, DSL-N16, and DSL-AC750, and here are links to the firmware you should install for each of these:
