Long before modern ransomware and data leaks dominated headlines, early hackers exposed major weaknesses in the growing digital world. From internet worms to huge denial-of-service attacks, these cases caused financial chaos, disrupted governments and businesses, and forced companies to take cybersecurity far more seriously as the internet rapidly expanded worldwide.
#1: Hackers Shut Down Estonia’s Online Infrastructure (2007)
In 2007, Estonia faced massive cyberattacks after political tensions with Russia escalated over the relocation of a Soviet war memorial. Government offices, banks, newspapers, and communication networks were overwhelmed by coordinated traffic floods. Because Estonia relied heavily on digital systems, the attacks became an early warning about cyber warfare between nations.
