Microsoft fixes four zero-day flaws in Exchange Server exploited by China's ‘Hafnium’ crew to steal sensitive data

Patch ASAP: Holes used to raid top-tier targets and stash info in Kim Dotcom's old cloud file locker

Microsoft says Beijing-backed hackers are exploiting four zero-day vulnerabilities in Exchange Server to steal data from defense contractors, law firms, and infectious disease researchers.…

from The Register