The major security breach occurred after her boyfriend Simon Konecki's email was allegedly hacked into.
Photos of her five-month ultrasound scan, a selfie of the superstar while pregnant, and a touching image of her then-newborn son Angelo swaddled in blankets are said to have been circulated on Facebook after a fan posted them online, reported Daily Telegraph.
Another image stolen is from Adele's childhood, which shows her at the bottom of a slide, sticking her tongue out, as well as a more recent photo of the singer lying on a bed with a champagne bottle and a cigarette.
A representative for Adele is yet to comment and it appears the leaked photos have since been taken down from Facebook.
News of the latest celebrity hack attack emerges hours after Harry Styles and Kendall Jenner had their intimate holiday photos from a their Christmas getaway in St Barts last year leaked on Twitter, after the One Direction singer's mother had her iCloud account hacked.