Singapore ISP Leaves 1,000 Routers Open to Attack May 28, 2018 https://threatpost.com/singapore-isp-leaves-1000-routers-open-to-attack/132315/
When I worked at an ISP, we could also access routers to help with troubleshooting WIFI and VOIP problems, but after about 15 minutes we were automatically logged out. Sounds like this wasn't the case with SingTel routers, big blunder.