What happened in the WK Kellogg Co. data breach?

Cleo’s file-transfer servers were hacked on 7 Dec 2024, giving the CL0P ransomware gang access to files containing WK Kellogg Co. employee data.

Which personal information was exposed by WK Kellogg Co.?

Names, Social Security numbers, dates of birth, addresses, government IDs, medical, and financial details were potentially compromised.

Has WK Kellogg Co. offered identity-theft protection?

Yes. Affected individuals are eligible for free credit monitoring, fraud consultation, and identity-restoration services through Kroll.

How do I join the WK Kellogg Co. data breach lawsuit?

You can submit your details for a free case evaluation. If you qualify, attorneys will handle the claim on a contingency basis—no fees unless compensation is recovered.

What should I do if I detect suspicious activity?

Report unauthorized transactions to your bank, file a fraud alert with credit bureaus, and consider a security freeze to stop new accounts from being opened.

WK Kellogg Co. Data Breach Lawsuit Investigation

Did the CL0P ransomware gang get access to your personal information? WK Kellogg Co. has confirmed a cyber-attack that exposed sensitive employee data—and time to act is limited. Find out if you qualify for compensation and identity protection today.

Download Official Breach Notice (PDF)

What Happened?

On 27 February 2025, WK Kellogg Co.—the iconic cereal maker headquartered in Battle Creek, Michigan—learned that its secure file-transfer vendor Cleo had been compromised on 7 December 2024. The ransomware outfit CL0P publicly claimed responsibility two days earlier on the dark web, adding pressure by threatening to release stolen data.

Data Exposed

The review of the compromised Cleo servers indicates that highly sensitive employee information was accessible to the intruders, including:

Full names
Social Security numbers
Dates of birth
Home addresses
Government-issued identification numbers
Medical information
Financial information

Although only three New Hampshire residents are confirmed in state filings so far, the nationwide total has not yet been released—meaning the real scope could be far larger.

WK Kellogg Co.’s Response

The company immediately launched an internal investigation and required Cleo to supply a full listing of affected files. WK Kellogg Co. is now offering free identity-protection services through Kroll, including:

Credit monitoring
Fraud consultation
Identity-theft restoration assistance

If you received a notice, be sure to activate these services by the deadline listed in your letter.

Your Legal Options

Under state and federal privacy laws, companies must safeguard personal data and promptly notify victims. If negligence played a role in the breach—or if notification was delayed—affected individuals may be entitled to damages that cover:

Out-of-pocket expenses (credit freezes, account fees, etc.)
Time spent resolving fraud or identity theft
Future identity-monitoring costs
Potential statutory or punitive damages

You can pursue these rights at no upfront cost. Class-action and individual lawsuits are currently under investigation. Completing a claim evaluation determines whether you qualify.

Protect Yourself Now

Enroll in Kroll services: Follow the instructions in your notification letter.
Obtain free credit reports: Visit AnnualCreditReport.com or call 877-322-8228.
Place a fraud alert or security freeze: Contact any of the three major credit bureaus.
Monitor account statements: Flag unfamiliar transactions immediately.
Document everything: Keep copies of letters, emails, and expenses related to the breach.

FAQ

What happened in the WK Kellogg Co. data breach?: Cleo’s file-transfer servers were hacked on 7 Dec 2024, giving the CL0P ransomware gang access to files containing WK Kellogg Co. employee data.
Which personal information was exposed by WK Kellogg Co.?: Names, Social Security numbers, dates of birth, addresses, government IDs, medical, and financial details were potentially compromised.
Has WK Kellogg Co. offered identity-theft protection?: Yes. Affected individuals are eligible for free credit monitoring, fraud consultation, and identity-restoration services through Kroll.
How do I join the WK Kellogg Co. data breach lawsuit?: You can submit your details for a free case evaluation. If you qualify, attorneys will handle the claim on a contingency basis—no fees unless compensation is recovered.
What should I do if I detect suspicious activity?: Report unauthorized transactions to your bank, file a fraud alert with credit bureaus, and consider a security freeze to stop new accounts from being opened.

Key Takeaways

The CL0P ransomware gang breached Cleo, exposing WK Kellogg Co. employee data.
Highly sensitive PII—including SSNs and medical info—may be involved.
Free Kroll identity monitoring is available, but must be activated by the deadline.
You may be eligible for financial compensation through legal action.
Act quickly: monitor credit, secure your accounts, and explore your legal rights.