Equifax announced a massive data breach affecting 143 million US consumers. Hackers exploited a vulnerability in Apache Struts to access names, social security numbers, birthdates, addresses, driver's license numbers, and credit histories stored on Equifax's servers. This breach poses significant risks to identity theft, as social security numbers were compromised. Those affected should obtain credit reports, monitor their credit, and consider initiating a credit freeze to protect their information going forward. The Equifax breach highlights the importance of data security preparedness and patching vulnerabilities.