Microsoft has released security updates as part of its monthly Patch Tuesday release train. None of the issues Microsoft fixed this month were publicly disclosed or exploited in real-world attacks before updates were released earlier today. Earlier today, Adobe issued its own Patch Tuesday security bulletin, which this month, only included one solitary bugfix for Adobe Flash Player. Microsoft has patched 34 issues affecting products such as Windows, Office, Exchange Server, Internet Explorer, Edge and ChakraCore. Adobe also released its own patch Tuesday security update, which also includes one Flash Player bug fix.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-december-patch-tuesday-fixes-34-security-issues/