A ransomware group calling itself LockBit5 claims to have carried out an attack on ADT, the security and monitoring company, with the claim dated August 23, 2026. This claim originates from a listing on the group’s own leak site, which was tracked and archived by ransomware.live, a security research platform that monitors ransomware groups’ public leak sites. At this time, ADT has not confirmed this claim, and no regulator or independent authority has verified it. BreachLetter is reporting on the existence of the claim itself, not on any confirmed breach.
What we know — and don’t
- A group identifying itself as LockBit5 listed ADT on its leak site, with a claimed date of August 23, 2026.
- ADT operates in the security and monitoring sector, categorized here as ‘other’ pending more specific classification.
- The specific types of data the group claims to have obtained have not been disclosed in the listing and have not been independently confirmed.
- ADT has not issued a public statement confirming or denying this claim as of this writing.
- No regulatory filing or breach notification related to this claim has been identified at this time.
What should you do if you have an account with this company?
- Change your account password, and avoid reusing that password on other sites.
- Enable two-factor authentication on your account if it is available and not already active.
- Be alert to phishing emails, texts, or calls that reference ADT, your account, or your home security system, especially those urging urgent action.
- Monitor your bank and credit card statements for unfamiliar activity, particularly if you have ever provided payment details to ADT.
- Consider using an identity monitoring service such as a service like Aura or LifeLock to get alerted if your personal information appears somewhere it shouldn’t.
- Avoid clicking links in unsolicited messages claiming to be from ADT; instead, log in directly through the company’s official website or app.
BreachLetter will update this page if ADT confirms this incident, if new details emerge from the group’s claim, or if the matter is officially reported to regulators.