List of data breaches and cyber attacks in December 2020 – 148 million records breached

You can find January 2021’s list of cyber attacks and data breaches here.

What else would you expect from the final month of 2020 than the highest number of publicly disclosed incidents we’ve ever recorded?

We logged 134 security incidents in December, which accounted for 148,354,955 breached records.

That brings the total for 2020 to more than 20 billion. We’ll have a separate post looking at the year’s data breaches and cyber attacks in more detail, but in the meantime, you can find the full list of December’s incidents below.

As usual, incidents affecting UK organisations are in bold.

Cyber attacks

ransomware stat


Human error is to blame for 88% of data breaches in the UK

Data breaches

32% of data breaches involved phishing.

Financial information

Malicious insiders and miscellaneous incidents

In other news…

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