List of Data Breaches and Cyber Attacks – May 2023

IT Governance found 98 publicly disclosed security incidents in May 2023, accounting for 98,226,877 breached records.

You can find the full list below, divided into four categories: cyber attacks, ransomware, data breaches, and malicious insiders and miscellaneous incidents.

Also be sure to check out our new page, which provides our analysis of the month’s cyber security landscape. You can find more information about our list and the biggest security incidents of the month, plus links to our previous monthly lists of data breaches.

Cyber attacks


Data breaches

Malicious insiders and miscellaneous incidents