Kemper data breach

Breach date: 2026-04-15. Added to this index: 2026-05-28. Accounts affected: about 269K. Domain: kemper.com.

What happened

In April 2026, the American insurance holding company Kemper Corporation was named by the ShinyHunters ransomware group in a "pay or leak" extortion campaign. The attackers allegedly accessed Kemper's Salesforce environment via social engineering as part of a broader campaign targeting hundreds of organisations using the same method. The group later published tens of gigabytes of data they claimed included internal directory data, Salesforce records and Stripe payment logs. Among the 269k unique email addresses were names, phone numbers, physical addresses and partial payment card data including the last 4 digits, expiry dates and card brands. Kemper confirmed the incident and stated they had engaged third-party cybersecurity experts and notified law enforcement.

Breach data sourced from Have I Been Pwned, used under CC BY 4.0. Additional breach metadata provided by XposedOrNot. DataExposed is an independent service and is not affiliated with or endorsed by either.

What was exposed

  • Email addresses: The email address you used to register or log in. It is the most common field in breaches because it doubles as your username on most sites.
  • Names: Your first name, surname and sometimes middle name or initials, as you gave them when you signed up. It appears in almost every breach because nearly every account asks for it.
  • Partial credit card data: Fragments of a payment card rather than the full number, typically the first six or last four digits, the card brand, the expiry date or the cardholder name.
  • Phone numbers: Your mobile or landline number, collected at signup for contact, delivery updates, marketing and two-factor codes.
  • Physical addresses: Your residential, postal, billing or delivery address, stored by retailers, utilities, banks, government services and almost any company that sends you something.
  • Purchases: Records of items or services you bought, often with order numbers, prices, dates, delivery addresses and the store or seller involved.

What to do now

  1. Check whether your own address is in this dataset with the free email breach check.
  2. Review the accounts connected to this service and turn on two-factor authentication.
  3. Turn on two-factor authentication on your email account first, because it is the reset path for everything else.
  4. Treat calls and messages that quote real details about you as hostile until you verify them another way.

Frequently asked questions

What data was leaked in the Kemper breach?

The Kemper breach exposed Email addresses, Names, Partial credit card data, Phone numbers, Physical addresses, Purchases. About 269K accounts were affected.

Was I affected by the Kemper breach?

Run the free email breach check with the address you used on that service. It will tell you whether your address appears in this dataset.

What should I do about the Kemper breach?

Treat any message that quotes details from this breach as suspicious, turn on two-factor authentication, and consider removing your details from people-search sites if your address or phone was included.

Next steps