Instagram has addressed user concerns following reports of a massive data breach affecting over 17.5 million accounts. While cybersecurity firm Malwarebytes claimed sensitive data like usernames, emails, and phone numbers were leaked and available on the dark web, Instagram's parent company Meta denies a system breach. Meta states an external party exploited a password reset function, leading to unsolicited reset emails, but asserts user accounts remain secure. They have fixed the issue and advise users to ignore suspicious emails, emphasizing that their systems were not compromised.