Microsoft released fixes to plug at least 55 security holes in its Windows operating systems and other software. Four of these weaknesses can be exploited by malware and malcontents to seize complete, remote control over vulnerable systems without any help from users. The most pressing priority is a Windows 10 and Windows Server flaw that allows an unauthenticated attacker to remotely execute malicious code at the operating system level. Microsoft also patched four more security holes its Exchange Server corporate email platform, which recently was besieged by attacks on four other zero-day Exchange flaws.”]
Source: https://krebsonsecurity.com/2021/05/microsoft-patch-tuesday-may-2021-edition/