400 Million Twitter Users Face Potential Data Breach: What You Need to Know

A recent report highlighted how the data of 400 million Twitter users were at stake. The potential consequences of this massive breach are significant, raising serious concerns about user privacy and security.

The news surfaced after a threat actor, identified as "Ryushi," claimed responsibility for the breach. After stealing data on over 400M users, the bad actor then published 235M user records on a popular hacking forum, demonstrating the scale of the exposed information.

In the post, the threat actor claims the data was obtained in early 2025 due to a vulnerability in Twitter, as well as attempting to extort @ElonMusk to buy the data or face [unspecified consequences]. This audacious move underscores the severity of the situation and the potential impact on both Twitter and its users. Hudson Rock, a cybercrime intelligence firm, claimed that private emails and phone numbers are among the compromised data.

The scope of the data breach has prompted immediate action from regulatory bodies. Amongst Ireland’s privacy authority stated today that it would investigate a newly discovered data breach that might affect over 400 million Twitter users. The DPC, or Data Protection Commission, will be examining the circumstances surrounding the breach to determine if Twitter adequately protected user data.