Breachesby GlyphKnownCircle
Disclosed Nov 17, 20181,957,600 accountsUnverified
In approximately April 2016, the "marketing automation for agents and professional service providers" company KnownCircle had a large volume of data obtained by an external party. The data belonging to the now defunct service appeared in JSON format and contained gigabytes of data related to the real estate and insurance sectors. The personal data in the breach appears to have primarily been used for marketing purposes, including logs of emails sent and tracking of gift cards. A small number of passwords for KnownCircle staff were also present and were stored as bcrypt hashes.
What is known
| People affected | 1,957,600 (accounts in the leaked data, per Have I Been Pwned) |
|---|---|
| Disclosed | Nov 17, 2018 |
| Happened | Apr 12, 2016 |
| Attack | Vendor breach |
| Data exposed | EmailsDates of birthNamesPasswordsPhone numbersAddresses |
| Sector | Tech |
| Status | Unverified: not yet confirmed by an official notice, a filing or the organization |
| Check your email | Have I Been Pwned |
Sources
Notices filed
History of this record
First recordedby backfillSource
First seen 2026-09-25 (Have I Been Pwned). Record counts are as reported. Not legal advice.