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Response snapshot Oct 27, 2026, 07:42 UTC

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Disclosed incidenthibp-kemper

Kemper breach: 269,299 accounts exposed

In April 2026, the American insurance holding company Kemper Corporation was named by the ShinyHunters ransomware group in a "pay or leak" extortion campaign .

At a glance

Sources
1 source

What to do

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Read Have I Been Pwned: Kemper (opens a new tab)

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.

Related technology

Sources

  1. Primary source

    Have I Been Pwned: Kemper (opens a new tab)

    Verified breach loaded into Have I Been Pwned: account count, exposed data types, and dates.

    Published Checked

  2. Primary source

    Have I Been Pwned breach API (opens a new tab)

    The breach list that supplied this entry.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, May 28). Kemper breach: 269,299 accounts exposed. https://kevwire.com/record/hibp-kemper

MLA

"Kemper breach: 269,299 accounts exposed." KEVWire, 28 May 2026, kevwire.com/record/hibp-kemper.

Chicago

KEVWire. "Kemper breach: 269,299 accounts exposed." Last modified May 28, 2026. https://kevwire.com/record/hibp-kemper.

Evidence summary (plain text)

Kemper breach: 269,299 accounts exposed (May 28, 2026).
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.
Sources:
Have I Been Pwned: Kemper: https://haveibeenpwned.com/Breach/Kemper
Have I Been Pwned breach API: https://haveibeenpwned.com/api/v3/breaches
Record ID: hibp-kemper.
Record origin: Ingested record.
AI evidence: Not assessed.
About this data

This record was ingested from a data source. Retrieved: Oct 27, 2026, 07:25 UTC. Ingestion is not an independent editorial investigation.

Verified by Have I Been Pwned. Breach date: 2026-04-15; loaded 2026-05-28. Exposed data: Email addresses, Names, Partial credit card data, Phone numbers, Physical addresses, Purchases. Counts are accounts in the loaded data, not necessarily distinct people.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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