2.3.0
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The 2.3.0 system update was released on May 15, 2017. This update was released for all regions.
Security flaws fixed: unknown.
Change-log
This is the official changelog from Nintendo regarding this update:
Improvements Included in Version 2.3.0
- General system stability improvements to enhance the user's experience
System Titles
It's unknown exactly what titles were updated, however the browser was not updated going by the WifiWebAuthApplet user-agent.