Under Armour: a cyberattack exposes data of 72 million customers

Have you ever wondered what would happen to your personal information after an online purchase? For Under Armour customers, this question became a worrying reality. Last November, the sportswear brand was the target of a cyberattack that compromised the data of millions of its customers. What exactly happened and what are the consequences of this massive leak?

The 3 must-know facts

• The personal data of 72 million Under Armour customers was exposed.
• The ransomware group Everest is behind the attack.
• Have I Been Pwned revealed that 75% of the compromised email addresses had already been breached in previous leaks.

The cyberattack against Under Armour

In November, Under Armour suffered a data breach orchestrated by the ransomware group Everest. The latter infiltrated the company’s systems, collecting sensitive customer information. This attack became public thanks to the service Have I Been Pwned, which allows users to check if their information has been compromised in data leaks.

According to available information, the hackers demanded a ransom in exchange for not disclosing the data. Faced with Under Armour’s refusal to comply with this demand, the cybercriminals released the information on dedicated forums, thus making the data of millions of people public.

Nature of compromised data

The stolen database contains various personal information, such as email addresses, names, physical addresses, birth dates, and customers’ purchase histories. An alarming fact: three out of four email addresses had already been hacked in the past, revealing a persistent vulnerability in the protection of personal data online.

Reactions and current context

To date, Under Armour has not yet issued an official statement regarding this incident. This silence comes as 2026 has already seen a surge in cyberattacks, affecting not only companies but also institutions such as the European Space Agency and the AZ Monica hospital in Antwerp.

This situation highlights the crucial importance of strengthening cybersecurity measures in a world where cyber threats are increasingly common.

Under Armour context

Founded in 1996 by Kevin Plank, Under Armour is an American company specializing in the manufacture of sportswear. It quickly established itself in the market thanks to its innovations in high-performance textiles, suitable for both professional athletes and sports enthusiasts. Despite its commercial success, this recent cyberattack underscores the challenges the company and other industry players face in protecting their customers’ data.

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