2021 adecco — Have I Been Pwned verified incident: Adecco
Data compromised
Email addresses, Genders, Geographic locations, Marital statuses, Names, Passwords, Phone numbers
Technical writeup
In March 2021, news broke of a massive data breach impacting millions of Adecco customers in South America which was subsequently sold on a popular hacking forum. The breach exposed over 4M unique email addresses as well as genders, dates of birth, marital statuses, phone numbers and passwords stored as bcrypt hashes. BreachHistory indexes the Have I Been Pwned (HIBP) corpus for third-party breach disclosure and victim notification context; treat record counts and fields as disclosed in that source at time of indexing.
Root cause
Variations by incident; see HIBP narrative and linked disclosures where present.