Just a day ago, Samsung started rolling out an update for the Exynos variants of the Galaxy S10 series in some regions. The update included August 2020 security patches for the Galaxy S10, Galaxy S10+, and Galaxy S10e, along with a new bootloader (v8) for the devices. Even though the update is yet to make its way to most Galaxy S10 users, Samsung has now started rolling out a similar update for the Exynos-powered Galaxy Note 10 devices.

Samsung Galaxy Note 10 XDA Forums || Samsung Galaxy Note 10+ XDA Forums

The latest update for the Samsung Galaxy Note 10 series (software version N975FXXS6CTGA/N975FOXM6CTGA) measures in at 168.86MB and it includes the August 2020 security patches. Much like the OTA update for the Galaxy S10 series, the update also brings a new bootloader (v6) for the Galaxy Note 10 series, which means that end-users will no longer be able to downgrade to older builds once they install this update.

Samsung Galaxy Note 10 series August 2020 security patches
Thanks to XDA Senior Member jaylence for the screenshot

As with all previous updates from Samsung, the latest OTA update is currently rolling out to a few users and it's expected to reach all Galaxy Note 10 series devices in the coming days. In case you don't wish to wait for the OTA update, you can use a community developed tool called Frija to download the updated firmware for your device from Samsung's repository. The required parameters can be found in the screenshot below.

Samsung Galaxy Note 10+ Frija firmware
Thanks to XDA Senior Member henklbr for the screenshot

Once you have downloaded the decrypted firmware package created by Frija, you can flash it on your device using Odin. You can follow the instructions given in this post if you aren't familiar with upgrading your Samsung device's firmware with Odin. Do note that the aforementioned update is only for the international Exynos 9825-powered Galaxy Note 10 devices and it isn't compatible with the Snapdragon 855-powered variants of the Galaxy Note 10 series.