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Mandiant Finds ShinyHunters Using Credential Stuffing to Breach Online Accounts – February 2026

Author/Source: Credential stuffing is when hackers use lists of usernames and passwords stolen from data breaches to try and log in to other websites. Data breaches are when sensitive information is stolen from a company or organization. See the full link here

Takeaway

This article discusses how a hacking group called ShinyHunters is breaking into people’s online accounts. They’re using stolen usernames and passwords from previous data breaches to access accounts on other websites.


Technical Subject Understandability

Intermediate


Analogy/Comparison

It’s like someone using the same key to try and unlock many different doors, hoping one of them will open.


Why It Matters

If you reuse passwords, hackers can get into your accounts. For example, if ShinyHunters gets your password from a breached gaming site, they might use it to access your email or bank account if you use the same password there.


Related Terms

Credential stuffing, data breaches

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