ADT confirmed a data breach affecting 5.5 million customers in April 2026, with ShinyHunters claiming responsibility and threatening to leak the data.
What happened
According to HIBP, home security firm ADT confirmed a data breach in April 2026 by the threat actor ShinyHunters. The group listed ADT on its website as part of a "pay or leak" extortion attempt.
What was exposed
The breach exposed email addresses, names, phone numbers, and physical addresses for approximately 5.5 million unique accounts. According to ADT, in a small percentage of cases, dates of birth and the last four digits of Social Security numbers or Tax IDs were also included.
Who is affected
The breach impacted 5.5 million unique email addresses associated with ADT customers.
What to do now
ADT advised that it had contacted all affected people. Individuals should monitor their accounts for suspicious activity and consider placing a fraud alert or credit freeze with credit bureaus if their Social Security number information was exposed.