On 29 August, somebody walked into the software that IT help desks use to take over your computer and fix it. They got root on the box, emptied its password vault, made themselves an administrator, and quietly logged into the machines it could reach. The company that makes the software didn't find out for a month.

Photo: NOIRLab/NSF/AURA/T. Slovinský / Wikimedia Commons (CC BY 4.0)