Here’s the list of top 25 cyber attacks of all time:

SolarWinds: The SolarWinds attack, which was revealed in December 2020, impacted government agencies and businesses around the world. The attack involved attackers infiltrating the software supply chain of SolarWinds, a provider of network management software, and distributing malware to customers through updates.
Marriott data breach: In November 2020, Marriott revealed that hackers had gained access to the reservation system of its subsidiary, Starwood Hotels & Resorts, and had accessed the personal data of up to 500 million guests.
Colonial Pipeline ransomware attack: In May 2021, the Colonial Pipeline, which transports fuel along the East Coast of the United States, was hit by a ransomware attack that forced the company to shut down operations. The attack had a significant impact on fuel supplies in the region.
Capitol One data breach: In July 2019, the personal data of over 100 million individuals was exposed in a data breach at Capital One. The attack was carried out by a former Amazon Web Services employee.
Equifax data breach: In September 2017, the personal data of 147 million individuals was exposed in a data breach at credit reporting company Equifax. The attack was the result of a vulnerability in the company’s web application software.
Yahoo data breaches: In December 2016, Yahoo disclosed that it had suffered two data breaches, one in 2013 and one in 2014, which exposed the personal data of all 3 billion of its users.
Target data breach: In December 2013, the personal data of 40 million credit and debit card users was exposed in a data breach at retail giant Target. The attack was the result of malware that was installed on the company’s point-of-sale systems.
Sony Pictures hack: In November 2014, Sony Pictures was the victim of a cyber attack that exposed sensitive emails and personal data of employees. The attack was later attributed to North Korea.
Anthem data breach: In February 2015, the personal data of 78.8 million individuals was exposed in a data breach at health insurance company Anthem. The attack was the result of a spearphishing campaign.
JPMorgan Chase data breach: In July 2014, the personal data of 76 million households and 7 million small businesses was exposed in a data breach at JPMorgan Chase. The attack was attributed to Russian hackers.
Uber data breach: In November 2017, Uber disclosed that it had suffered a data breach in October 2016 that exposed the personal data of 57 million riders and drivers.
OPM data breach: In June 2015, the personal data of 22 million individuals was exposed in a data breach at the Office of Personnel Management (OPM). The attack was attributed to Chinese hackers.
Deloitte data breach: In October 2017, Deloitte disclosed that it had suffered a data breach in March 2016 that exposed the personal data of clients and the confidential emails of Deloitte employees.
eBay data breach: In May 2014, the personal data of 145 million eBay users was exposed in a data breach. The attack was the result of the attackers gaining access to the company’s corporate network through the use of compromised employee credentials.
Home Depot data breach: In September 2014, the personal data of 56 million payment cards was exposed in a data breach at Home Depot. The attack was the result of malware being installed on the company’s point-of-sale systems.
Adobe data breach: In October 2013, the personal data of 153 million Adobe users was exposed in a data breach. The attack was the result of the attackers gaining access to Adobe’s network through the use of compromised employee credentials.
Dyn DDoS attack: In October 2016, internet performance company Dyn was the victim of a distributed denial of service (DDoS) attack that caused widespread internet disruption. The attack was launched using the Mirai botnet, which was made up of compromised IoT devices.
Snapchat data breach: In December 2013, the personal data of 4.6 million Snapchat users was exposed in a data breach. The attack was the result of a third-party app that was able to access Snapchat’s user database.
LinkedIn data breach: In May 2016, the personal data of 117 million LinkedIn users was exposed in a data breach. The data had been stolen in a 2012 data breach and was later sold on the dark web.
Airbnb data breach: In November 2014, Airbnb disclosed that it had suffered a data breach in October 2014 that exposed the personal data of its users. The attack was the result of an employee’s account being compromised.
Dropbox data breach: In August 2016, it was revealed that the personal data of 68 million Dropbox users had been exposed in a data breach that occurred in 2012. The data had been stolen and was later sold on the dark web.
Twitter data breach: In November 2017, Twitter disclosed that it had suffered a data breach in October 2017 that exposed the personal data of 330 million users.
TalkTalk data breach: In October 2015, the personal data of 157,000 TalkTalk customers was exposed in a data breach. The attack was the result of a SQL injection attack.
Ashley Madison data breach: In July 2015, the personal data of 37 million users of the Ashley Madison dating website was exposed in a data breach. The attack was carried out by a group calling itself the “Impact Team.”
VTech data breach: In November 2015, the personal data of 4.2 million children and 200,000 adults was exposed in a data breach at VTech, a manufacturer of children’s electronic toys. The attack was the result of a SQL injection attack.

These 25 cyber attacks demonstrate the importance of good digital hygiene and the need for individuals and businesses to take steps to protect themselves and their data against cyber threats. By being aware of the risks and taking steps to protect against them, individuals and businesses can help reduce the chances of falling victim to a cyber attack.