List of data breaches and cyber attacks in March 2021 – 21 million records breached

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

Don’t be fooled by the fact that we only recorded 20,995,371 breached records in March; it was one of the leakiest months we’ve ever seen, with 151 recorded incidents.

By comparison, there was a seemingly Lilliputian 82 recorded breaches in January and 118 in February.

The issue is that in far more cases than we’d expect, the number of breached records wasn’t included in the notification, so we can’t include it here.

We typically expect ambiguity when it comes to ransomware, because organisations are locked out of their files and can’t calculate what’s been affected. But there were dozens of other cyber attacks and data breaches where the organisation either didn’t know or reveal the extent of the damage.

You can find our full list of incidents below, with those affecting UK organisations listed in bold.

Meanwhile, you can stay up to date with the latest news by subscribing to our Weekly Round-up or visiting our blog.

Cyber attacks

32% of data breaches involved phishing.


ransomware stat

Data breaches

Financial information

Malicious insiders and miscellaneous incidents

In other news…

Will you be next?

No one thinks their organisation will fall victim to a security incident until it happens to them – but as we’ve demonstrated here, data breaches are so prevalent that everyone must have a plan.

If you find yourself staring down disaster, IT Governance is here to help. Our Cyber Incident Response service provides the help you need to deal with the threat, as our experts guide you through the recovery process.

They’ll review the breach, mitigate the damage and ensure that you are up and running again as soon as possible.

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