Timeline of Cybersecurity by

1900s - 1940s (Early hacking)

30170502 — 2025-09-03 13:40:16 UTC

1903 – Wireless telegraphy sabotage: Nevil Maskelyne disrupts a demonstration, showing vulnerabilities in communication systems.
1930s – Breaking Enigma: Polish and Allied cryptologists decipher German codes, critical in WWII.

30170502 — 2025-09-03 13:40:49 UTC

1988 – Morris Worm: One of the first internet worms, causing widespread disruption and highlighting security flaws.

30170502 — 2025-09-03 13:41:27 UTC

1994 – AOHell & early phishing attacks: Targeted AOL users; early example of social engineering attacks.

30170502 — 2025-09-03 13:42:22 UTC

2000 – ILOVEYOU virus: Email-based malware spreads globally, causing billions in damages.
2007 – Estonia cyberattacks: Nation-state cyber warfare targeting government and banks, showing geopolitical threats.

30170502 — 2025-09-03 13:43:02 UTC

2013 – Target data breach: 40 million credit cards stolen, highlighting retail cybersecurity risks.
2014 – Sony Pictures hack: Likely politically motivated attack exposing sensitive corporate data.
2017 – WannaCry ransomware attack: Affects 150+ countries, showing ransomware’s global threat.
2018 – Marriott breach: Personal data of 500 million guests exposed; one of the largest hospitality breaches.

30170502 — 2025-09-03 13:47:45 UTC

2020 – SolarWinds supply chain attack: Compromises U.S. government agencies and companies via software updates.
2021 – Colonial Pipeline ransomware attack: U.S. fuel supply disrupted, highlighting vulnerabilities in critical infrastructure.
2021 – T-Mobile breach: Personal data of over 40 million customers exposed.
2022 – Lapsus$ attacks on Microsoft, NVIDIA, Samsung: High-profile data leaks and code theft targeting major tech companies.
2025 - 4Chan attack causes databreach: Rival message board breaches 4chans servers stealing personal data and shutting down the website
2025 - Elmo X account hacked: Anonymous user hacked into the X account posting antisemitic tweets as well as calling out Donald Trump for his suspected involvement with Jeffery Epstein.