A bug in the ubiquitous Log4j library can allow an attacker to execute arbitrary code on any system that uses Log4j to write logs. Does yours?

Here’s what you should know: What is Log4j and why does it matter? Log4j is one of the most popular logging libraries used online, according to cybersecurity experts.

Cybersecurity researchers warn that insecure instances of Lo4j are still out there to be exploited - and are easy for attackers to discover.

Log4Shell is the latest hacker exploit rocking the internet, and it’s arguably the worst yet. The vulnerability is in an obscure piece of software used on millions of computers.

Here’s what you should know: What is Log4j and why does it matter? Log4j is one of the most popular logging libraries used online, according to cybersecurity experts.