10 Biggest Data Breaches in History Revealed (2024)

A new study has revealed the ten largest data breaches in history, based on the number of compromised records.

Cybersecurity has become a hot-button issue for the business world in recent years, with data breaches popping up on what feels like a daily basis. Between the skills shortage and the evolving strategies of hackers, businesses around the world are always playing catch up when it comes to shoring up their security.

Fortunately, the ten largest data breaches in history haven’t been too recent, but that doesn’t mean we can’t learn a thing or two about how to avoid them.

10 Biggest Data Breaches Ever

The research from NinjaOne, a patch management software company, investigated the largest data breaches in history by looking at the companies that saw the greatest number of records compromised in their breaches.

Here are the top ten biggest data breaches ever, and how many records were leaked in the process:

  1. Yahoo (2013) – 3 billion
  2. First American Corporation (2019) – 885 million
  3. Facebook (2019) – 540 million
  4. Marriott International (2018) – 500 million
  5. Yahoo (2014) – 500 million
  6. Friend Finder Network (2016) – 412 million
  7. Exactis (2018) – 340 million
  8. Airtel (2019) – 320 million
  9. Truecaller (2019) – 299 million
  10. MongoDB (2019) – 275 million

There are a few key takeaways from all this research, not the least important of which is that none of these breaches has happened in the 2020s, which is an encouraging sign for the state of cybersecurity in the modern era.

However, it’s also worth noting that Yahoo clearly had a cybersecurity problem in the early 2010s. Not only does the company account for the largest data breach in history by a factor of three, but Yahoo also accounts for two of the top five largest data breaches in history, all in a yearlong period. At 3.5 billion total records lost, that’s nearly half the population of the entire planet.

The Importance of Cybersecurity

So, a few million records were leaked, what’s the big deal? Well, in the modern era, data remains a driving force in the tech industry, making it a prime target for hackers.

“Data is one of the most valuable commodities in our interconnected world, and it pays dividends to keep it safe with proper security practices.” – a spokesperson for OneNinja

For businesses, data breaches like the ones listed above can have a dire impact. From lost revenue to a lack of trust, these breaches have far-reaching consequences that can have a decidedly negative effect on your business.

In fact, one study found that a data breach can cost businesses almost $10 million on average. Even worse, 55% of consumers say that they would be less likely to patronize a business that has been breached, so finding a way to protect your business from data breaches is clearly a pertinent priority.

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How to Avoid Data Breaches

Now that you’ve been sufficiently scared into shoring up your security, you need to know how to avoid data breaches. After all, hackers are getting more and more advanced by the minute, and it’ll take a multi-faceted approach if you want to keep them at bay.

There are a few tools that can help get you started. VPNs are vital for businesses, particularly those with remote and hybrid workers, as it keeps your data transfers secure from any outside onlookers. Password managers are also quite helpful, especially when you consider the majority of breaches stem from poor password security.

Beyond that, though, you’re really going to want to get a cybersecurity professional on your team as soon as possible if you can afford it. The threat of data breaches is ever evolving, and dedicating your inexperienced time to solving these problems is going to be a huge time-suck on your business. After all, you don’t want to end up like Yahoo.

10 Biggest Data Breaches in History Revealed (2024)

FAQs

10 Biggest Data Breaches in History Revealed? ›

All-time biggest online data breaches 2024

The largest reported data leakage as of January 2024 was the Cam4 data breach in March 2020, which exposed more than 10 billion data records. The second-largest data breach in history so far, the Yahoo data breach, occurred in 2013.

What was the biggest data breach in history? ›

All-time biggest online data breaches 2024

The largest reported data leakage as of January 2024 was the Cam4 data breach in March 2020, which exposed more than 10 billion data records. The second-largest data breach in history so far, the Yahoo data breach, occurred in 2013.

What company had the largest data breach? ›

Yahoo (2013) – 3 billion records

The 2013 attack on Yahoo is the largest known data breach in history, with all three billion Yahoo user accounts at the time being compromised. Originally, it was reported that only one billion user accounts were compromised, but this figure was later revised to three billion.

What is the largest data breach fine ever? ›

20 biggest GDPR fines so far
  • Meta GDPR fine- €1.2 billion. ...
  • Amazon GDPR fine – €746 million. ...
  • Meta GDPR fine – €405 million. ...
  • Meta GDPR fine – €390 million. ...
  • TikTok GDPR fine- €345 million. ...
  • Meta GDPR fine – €265 million. ...
  • WhatsApp GDPR fine – €225 million. ...
  • Google LLC fine- €90 million.

Which business suffered the biggest data breach of all time, putting billions of its customers' sensitive data at risk? ›

1 - Yahoo (2013)

This breach was labeled by the New York Times as the “biggest known breach of a company's computer network” ever. After the company was purchased by Verizon, it came to light that Yahoo had been breached in 2013 and that 3 billion users' data had been compromised.

What is the mother of all data breaches? ›

Recently, we witnessed a seismic event with the emergence of the Mother of All Breaches (MOAB). This massive data leak amalgamates records from numerous past breaches, culminating in a staggering 12 terabytes of information across 26 billion records—now potentially in the hands of data brokers and bad actors.

Has Google ever had a data breach? ›

The most recent one happened in January 2023, when Google's cell network provider Google Fi confirmed a data breach, which allowed hackers to steal 37 million customers' data, including phone numbers, account status, SIM card serial numbers and other information related to details about customers' mobile service plans.

What is the most famous security breach? ›

The 72 Biggest Data Breaches Ranked by Impact
  • CAM4 Data Breach. Date: March 2020. ...
  • 2. Yahoo Data Breach (2017) Date: October 2017. ...
  • Aadhaar Data Breach. ...
  • First American Financial Corporation Data Breach. ...
  • LinkedIn Data Breach (2021) ...
  • 8. Facebook Data Breach (2019) ...
  • 9. Yahoo Data Breach (2014) ...
  • Starwood (Marriott) Data Breach.
Jan 22, 2024

What is the average payout for a data breach? ›

This is the obvious one, hackers want to get paid. According to Sophos's State of Ransomware 2024 report, the average ransom payout was $812,360. Through their surveys, Coveware found a $850,700 average payout, and median payout of $200,000 in Q3 2023.

Has Apple ever had a data breach? ›

An Apple-commissioned data breach report found 2.6 billion records were stolen by hackers between 2021 and 2022.

What is the biggest password leak ever? ›

1 RockYou21, 2021, 8.4 billion records

RockYou2021, named after a leak in 2009, is a compilation revealed on a hacker forum of more than 8 billion passwords, which makes it the largest set of passwords to leak in the history of the internet.

Which country has the most data breached? ›

The U.S. jumped to 1st place after trifold yearly growth with almost 100 million breached online accounts in 2023, being previously ranked 3rd with 31M in 2022, after Russia and China. Europe's data breaches decreased from 160M in 2022 to 116.6M in 2023.

What is the world's largest data breach and hack? ›

In January 2024, a data breach dubbed the "mother of all breaches" was uncovered. Over 26 billion records, including some from Twitter, Adobe, Canva, LinkedIn, and Dropbox, were found in the database. No organization immediately claimed responsibility.

Who is the best hacker in history? ›

Kevin Mitnick is one of the most famous black-hat hackers turned ethical hackers in history and is considered by many to be the no 1 hacker in the world. Mitnick's early years were marked by his extraordinary talent for hacking and manipulation of computer systems.

What gets hacked the most? ›

Manufacturing. The 2024 Threat Intelligence Index by IBM Security reveals that manufacturing is one of the most attacked industries, with malware and ransomware attacks being the top cyber threat vectors.

What is the biggest cyber crime case in US history? ›

The data breach of Yahoo is one of the worst and most infamous cases of a known cyberattack and currently holds the record for the most people affected. The first attack occurred in 2013, and many more would continue over the next three years.

What is the biggest bank data breach? ›

The 10 Biggest Data Breaches in the Finance Sector
  • Equifax Data Breach. ...
  • Heartland Payment Systems Data Breach. ...
  • Capital One Data Breach. Date: March 2019. ...
  • JPMorgan Chase Data Breach. Date: October 2014. ...
  • Experian. Date: August 2020. ...
  • Block. Date: Apr 2022. ...
  • Desjardins Group. Date: June 2019. ...
  • Westpac Banking Corporation. Date: June 2013.

What is the biggest data breach and cost? ›

1. Meta (Facebook) : $1.3 Billion. In May 2023, Ireland's Data Protection Commission (DPC) concluded an enquiry into Meta Platform Ireland Limited (“Meta Ireland”) it had initiated in Aug 2020, billing the social media giant €1.2 billion ($1.3 billion) for violation of the GDPR.

What was the massive data breach in 2017? ›

Information accessed in the breach included first and last names, Social Security numbers, birth dates, addresses and, in some instances, driver's license numbers for an estimated 143 million Americans, based on Equifax' analysis. Information on almost 14 million British residents was also compromised.

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