LIDL DISCLOSES CUSTOMER DATA BREACH AFTER HACKERS COMPROMISE THIRD-PARTY SERVICE PROVIDER

European discount supermarket giant Lidl has disclosed a cybersecurity incident affecting customers of its online shops in Germany, Belgium, and the Netherlands after attackers gained unauthorized access to customer information stored by an external IT service provider.

According to notifications issued to affected customers, the breach did not involve Lidl’s primary online shopping platform. Instead, the incident originated from a separately maintained customer database hosted by a third-party service provider responsible for handling certain customer information.

Lidl stated that unknown attackers briefly accessed the database and successfully exfiltrated part of its contents before the incident was detected.

The compromised information includes:

• Customer titles
• First and last names
• Email addresses
• Telephone numbers
• Dates of birth
• Customer identification numbers

The retailer emphasized that there is no evidence indicating that passwords, billing addresses, shipping addresses, banking information, credit card information, or other payment data were exposed during the incident. Lidl also stated that customer accounts remain secure and that there is currently no indication attackers gained access to login credentials.

According to the company, it was notified of the breach during the previous week, after which the affected service provider immediately secured the impacted systems. Lidl also confirmed that it has filed a criminal complaint and reported the incident to the appropriate data protection authorities in accordance with applicable European data protection regulations.

Although investigators have not identified evidence that the stolen information has been misused, Lidl is advising affected customers to remain vigilant for phishing attempts, fraudulent emails, text messages, and telephone scams. Criminals frequently use stolen personal information to create convincing social engineering attacks designed to trick victims into revealing passwords, financial information, or multi-factor authentication codes.

Supply chain and third-party service provider compromises continue to represent one of the fastest-growing cybersecurity risks facing organizations worldwide. Rather than attacking a company’s primary network directly, threat actors increasingly target vendors, cloud providers, managed service providers, software suppliers, and other external partners that maintain access to sensitive customer or enterprise information. These attacks can allow cybercriminals to compromise large numbers of organizations through a single third-party provider.

At this time, Lidl has not publicly identified the external IT service provider involved in the incident, nor has the company disclosed how many customers were affected. Officials also have not attributed the intrusion to a specific threat actor or indicated whether ransomware played any role in the breach.

As one of Europe’s largest grocery retailers, Lidl operates approximately 12,900 stores across 32 countries and employs roughly 395,000 people. The company’s extensive international presence means cybersecurity incidents affecting its digital operations receive significant attention due to the potential impact on millions of customers across multiple countries.

Cybersecurity professionals note that even when financial information is not compromised, personally identifiable information such as names, email addresses, dates of birth, and telephone numbers can remain valuable to cybercriminals. Such information is frequently combined with previously stolen datasets to conduct identity theft, credential phishing, account takeover attempts, business email compromise, and other targeted fraud campaigns.

Customers who receive unexpected emails, text messages, or phone calls claiming to originate from Lidl or requesting personal information should independently verify the legitimacy of the communication before responding. Security experts also recommend monitoring online accounts for suspicious activity and remaining cautious of unsolicited requests involving account verification or payment information.

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