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Quick answer: In 2017, hackers exploited a known flaw in the Apache Struts software on Equifax’s online dispute portal, months after a fix was available. They stole names, dates of birth and Social Security numbers of about 147 million people.…
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Quick answer: In cyber security, an SLA (service level agreement) is the part of a contract…
Quick answer: In May 2021, the DarkSide ransomware group got into Colonial Pipeline’s network through a…
Knowing what to do after a data breach limits the damage: in the first hour, change…
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Read the guide → Breach lessonsMajor cyberattacks and what to learn
From Equifax to Stryker and Canvas in 2026: breaches and outages, with sources.
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How your data is tracked and recorded, and a checklist to reduce it.
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What the biggest cyberattacks, up to 2026, teach every business
Most major breaches came down to the same few failures: missing patches, passwords without MFA, trusted suppliers and people who were tricked.
Read all 25 attack lessons
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