Starwood reservation system breach (2014–2018)
Data compromised
Names, Addresses, Payment card details, Passport numbers, Credentials, Payment information
Technical writeup
Unauthorized access to Starwood's guest reservation database from 2014 until discovery in 2018. Exposed names, addresses, passport numbers, travel details, and encrypted payment cards.
Root cause
Compromised credentials and long-undetected access to legacy Starwood systems post-acquisition.