No, the 16 billion credentials leak is not a new data breach
From BleepingComputer to All on Thu Jun 19 18:31:16 2025
News broke today of a "mother of all breaches," sparking wide media coverage filled with warnings and fear-mongering. However, it appears to be a compilation of previously leaked credentials stolen by infostealers, exposed in data breaches, and via credential stuffing attacks. [...]