The biggest cyber attacks in world history!

Oya Paktas
2 min readDec 18, 2022

There have been many major cyber attacks in world history. There have been several large and notable cyber attacks in the world that have caused widespread harm and disruption. Here are a few examples:

  1. WannaCry ransomware attack: In May 2017, the WannaCry ransomware attack affected more than 200,000 computers in 150 countries, including the UK’s National Health Service, the Spanish telecommunications company Telefónica, and the German rail company Deutsche Bahn. The attack exploited vulnerabilities in Microsoft Windows and encrypted users’ files, demanding a ransom for their release.
  2. Equifax data breach: In 2017, the credit reporting company Equifax suffered a data breach that exposed the personal data of 147 million people, including names, addresses, Social Security numbers, and driver’s license numbers. The breach was caused by a failure to properly patch a known vulnerability in the company’s website software.
  3. Sony Pictures hack: In 2014, a group calling itself the “Guardians of Peace” hacked into Sony Pictures’ computer systems and released a large amount of sensitive data, including employee personal information, emails, and unreleased films. The U.S. government attributed the attack to the North Korean government.
  4. Target data breach: In 2013, the retail company Target suffered a data breach that exposed the credit card and personal information of 40 million customers. The breach was later linked to the theft of credentials from a heating, ventilation, and air conditioning subcontractor.
  5. Marriott data breach: In 2018, the hotel chain Marriott International announced that its reservation system had been hacked, potentially exposing the personal information of up to 500 million guests. The breach is believed to have started in 2014 and was discovered in 2018.

These attacks are just a few examples, and there have been many major cyber attacks in world history.

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Oya Paktas

I work in global business development and sales in the Software and Cybersecurity field. https://www.linkedin.com/in/oyapaktas/