FFS people, this is called MAPP and the program has been public and a huge security success for the last few years. Microsoft advises lots of security companies about patches slightly before they are issued. That way, everyone has options on day 1 and people aren't scrambling for additional mitigations every Patch Tuesday.
If you want to be outraged, check out all the Chinese companies on the list of partners!
If you want to be outraged, check out all the Chinese companies on the list of partners!
https://www.microsoft.com/security/msrc/collaboration/mapp.a...