To download the update, go to Settings > General > Software Update, tap Update Now and follow the onscreen prompts.

"This update provides important bug fixes and security updates and is recommended for all users," Apple wrote in the update's description. 

Apple has not stated what issues the update addresses. Usually Apple posts an update's release notes and CVE entries -- which stands for common vulnerabilities and exposures -- online shortly after releasing an update. Apple hasn't posted this information yet, but Apple has told CNET in the past that it might take time to post this information online.

CNET will update this story as more information becomes available.