The 2.2.0 system update was released on April 17, 2017. This update was released for all regions.
Security flaws fixed: unknown.
This is the official changelog from Nintendo regarding this update:
Improvements Included in Version 2.2.0
- General system stability improvements to enhance the user's experience
Exactly the following titles were updated in the below ranges:
- The only updated 01000000000000XX titles are:
- The only updated 01000000000008XX titles are: 0100000000000801 (Error message archive), 0100000000000816, and System_Version_Title.
- There are no updated 01000000000010XX titles.