Samsung is now rolling out the September 2021 security update. Various high-end and mid-range Galaxy smartphones have already received the update, and it is time for the Galaxy Note 10 series to receive it too. The update has started reaching the Galaxy Note 10 5G and the Galaxy Note 10+ 5G in South Korea.
The update comes along with the September 2021 security patch under firmware version N971NKSU2FUH7. It is not known yet what exactly vulnerabilities the update fixes. It may address general bugs and some device stability problems. If you haven't received the update notification yet, you can check for it in the Settings menu. Just select "Software Update" and tap "Download and Install".
Samsung released the Galaxy Note 10 series featuring the Android 9 Pie-based One UI in August 2019. The series was updated to the Android 11-based One UI 3 at the end of 2020.