Luke Irwin  1st December 2021

In November, we discovered 81 publicly disclosed cyber security incidents, accounting for 223,615,390 breached records.

With one month left in 2021, the annual total running total of compromised records is to just shy of 5 billion.

Keep an eye out for our end-of-year report in the next few weeks, where we’ll break down the findings of these lists – or subscribe to our Weekly Round-up to get the latest news sent straight to your inbox.

In the meantime, you can find the full list of security incidents below, with those affecting UK organizations listed in bold.


Different techniques and tools used by cyberattackers to exploit a system are thoroughly discussed and analyzed in their respective chapters.

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