The Microsoft June 2021 security updates have been released and consist of 50 CVEs.
5 are rated Critical
45 are rated Important
According to Microsoft, six of these bugs are currently under active attach and three are publicly known at the time of release.
More information: https://msrc.microsoft.com/update-guide/releaseNote/2021-Jun

Note: May 11, 2021 update (KB5003173) must be installed before installing the latest cumulative update (LCU)
Please see: https://support.microsoft.com/en-us/topic/may-11-2021-kb5003173-os-builds-19041-985-19042-985-and-19043-985-2824ace2-eabe-4c3c-8a49-06e249f52527