IT Governance found 71 publicly disclosed security incidents in September 2023, accounting for 3.81 billion breached data records.
You can find the full list below. Follow the links for further information about each incident.
There is one major outlier this month: September’s total is skewed by the huge data breach at DarkBeam, which saw 3.8 billion data records exposed. You can read about that, and the year’s other incidents to date, on our new page, which provides an overview of the known data breaches and cyber attacks in 2023.
That page also breaks down each month’s security incidents and provides more information about the biggest and most notable breaches.
In previous months, we’ve distinguished between cyber attacks, data breaches, ransomware attacks, and malicious insiders and miscellaneous incidents. However, these categories overlap more and more (for instance, ransomware infections result from cyber attacks and, in turn, often result in data breaches) so attempting to differentiate between them is increasingly futile.
This month’s incidents therefore aren’t split into categories but are presented as a single list, while we consider different approaches to this blog and how best to present the data in future.