[Urgent] Critical Vulnerabilities in PHP, Java, Node.js, and Certificate Authorities | A Beginner's Guide to Types of Cyber Attacks and Zero-Day/N-Day Attacks

IntroductionOver the past few days, there has been a series of reports regarding critical vulnerabilities. These affect "PHP, ...

[Alert/Explanation 1] Following PHP, is there a vulnerability in Java too? Are our computers and apps safe?

On October 21, 2026, the Information-technology Promotion Agency, Japan (IPA) released a security alert regarding the ...