What is the issue?
There is an 0-day vulnerability in the MS Internet Explorer (IE) that is being actively misused.
For more information on the security vulnerability, you can check the Microsoft Security Guidance.
Currently you should avoid using Internet Explorer as your main browser.
Using IE for Basware Workplace client is still OK, where mandatory. The security vulnerability does not affect the Basware applications that need to be used only with Internet Explorer.
NOTE: All Basware applications that do not need IE to work, can be used in another browser like Chrome, Firefox, etc.
Microsoft is working on a fix and there is a workaround available in the above linked article.
Other use cases should be checked with your IT department where needed.