None of The Qt Company products are affected by the Apache Log4j vulnerability (CVE-2021-44228).
The vulnerable or any other versions of the Apache log4j library are not used in the Qt framework, Qt Creator, Qt Design Studio, Squish, Coco, Test Center, Qt for MCU or in any other products offered by The Qt Company. Therefore, no actions are required for users of Qt or any of the other products of The Qt Company due to the Log4j vulnerability.
Like many others, also for us some of our IT systems were affected and we have taken the needed actions to address the vulnerability. No attacks using the vulnerability have been detected in any of our system or systems hosted for us by others.
If you have any questions or concerns related to this, please contact our support team(s).