APPLE INSIDER
Apple has released an update for macOS Big Sur bringing it to version 11.2.1, an update that solves problems with recharging some MacBook Pro models, and fixes to the Sudo vulnerability.
The update is available to users manually by opening System Preferences then selecting Software Update. It will also be installed automatically on systems for users who enabled that setting.Apple issues the update a week after its main macOS Big Sur 11.2 update, with the version numbering indicating it is mainly a bug fix and performance release.
Source: APPLE INSIDER