Gemini, a cryptocurrency exchange, has reported that some of its customers have been targeted in phishing campaigns believed to be the result of a third-party vendor.
Chinese media outlet Wu Blockchain has reported that up to 5.7 million users were affected, with their email addresses and phone numbers being leaked.
However, the company has confirmed that no account information or systems were compromised and that all funds and customer accounts remain secure.
It has not identified the responsible party but has provided recommendations for those affected.
Phishing attacks involve attackers sending fraudulent messages in an attempt to trick individuals into revealing sensitive information, which can then be used to deploy malicious software or ransomware.