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.

A Year Later, That Brutal Log4j Vulnerability Is Still Lurking Despite mitigation, one of the worst bugs in internet history is still prevalent—and being exploited. Photograph: zf L/Getty Images ...

Banks have extra reason to be concerned by the news that a commonly used piece of software could be exploited by hackers.

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.