WK Kellogg Data Breach Class Action

At Console & Associates, our data breach lawyers are closely examining the recent WK Kellogg data breach. This data breach was disclosed following a cyber security incident at Cleo, a third-party vendor used by WK Kellogg, which potentially exposed sensitive personal identifiable information of employees.

What Happened?

A recent report from the Attorney General of Maine states that the WK Kellogg data breach occurred due to a cyber security incident involving Cleo, a technology vendor that provides secure file transfer applications for many organizations, including WK Kellogg.

The timeline of events reveals that on February 27, 2025, WK Kellogg was notified that Cleo may have experienced a security breach. Upon investigation, it was confirmed that unauthorized parties had gained access to certain Cleo servers on December 7, 2024. These compromised servers contained files with confidential WK Kellogg employee information.

After the breach was discovered, Cleo provided WK Kellogg with a list of the compromised files. WK Kellogg then conducted a thorough review to identify the specific information exposed and which individuals were affected.

The types of sensitive information exposed in this breach include:

• Names
• Social Security numbers

Data breach letters were sent out by WK Kellogg on April 4, 2025, informing affected individuals about the nature of the incident and specifically which data elements were compromised. The notification letters should provide recipients with details about what personal information of theirs was exposed during the security incident.

Steps To Take If You Were Affected By A Data Breach

1. Monitor all accounts and credit reports closely
   1. Set up alerts for suspicious activity
   2. Review all financial statements thoroughly
   3. Request free credit reports and examine them for unauthorized entries
      
      
2. Consider freezing your credit
   1. Contact all three major credit bureaus to place a freeze
   2. Understand this prevents new accounts from being opened in your name
   3. Remember to temporarily lift the freeze when applying for legitimate credit
      
      
3. Look out for phishing attempts using information from the WK Kellogg data breach
   1. Be wary of unexpected emails or messages claiming to be from WK Kellogg
   2. Don't click on suspicious links or download unexpected attachments
   3. Verify all communications through official channels
      
      
4. Change passwords for affected accounts
   1. Create strong, unique passwords for each account
   2. Use a combination of letters, numbers, and special characters
   3. Consider using a password manager for better security
      
      
5. Enable two-factor authentication where possible
   1. Add this extra layer of security to all important accounts
   2. Use authenticator apps rather than SMS when available
   3. Keep backup codes in a secure location

For more detailed guidance, explore our “Guide for Victims of a Data Breach” to better understand measures you can take to protect yourself after a data breach.

WK Kellogg Overview

WK Kellogg Co represents a significant entity in the North American food manufacturing sector, with operations focused primarily on ready-to-eat cereal production. The company emerged as a standalone business entity in 2023 following a strategic corporate separation from the original Kellogg Company, which subsequently rebranded as Kellanova to focus on global snack foods, international cereals, and plant-based alternatives.

Headquartered in Battle Creek, Michigan—often referred to as the "Cereal City" due to its historical significance in cereal manufacturing—WK Kellogg Co maintains a substantial workforce of approximately 3,280 employees across its various operations. The company generates annual revenues of approximately $2.71 billion through its focused business model.

The company's product portfolio encompasses several well-established cereal brands including Frosted Flakes, Froot Loops, Raisin Bran, and Rice Krispies. Its business operations are concentrated in the North American market, where it maintains multiple manufacturing facilities and distribution networks to serve consumers across the United States and Canada.

WK Kellogg Data Breach Victims Have Rights - Don’t Wait to Act

How do you know that you were affected by the WK Kellogg data breach? Usually victims receive a NOTICE OF DATA BREACH in the mail, but the impact of a breach can be felt long before notices are sent to those affected. This can be in the form of fraudulent financial activity and other forms of identity theft.

If you believe you were affected, we encourage you to reach out to our data breach law firm for legal assistance through a no-cost consultation about your situation. We will review your eligibility to file a data breach class action lawsuit and discuss your legal rights and any compensation that may be available to you.

Complete our confidential contact form below and a member of our legal team will be in touch.