Microsoft published the latest security bulletin for May 2018, containing fixes for 67 security issues. The biggest issue patched this month is a zero-day in Internet Explorer that has been abused by a cyber-espionage campaign earlier this month. Microsoft also patched CVE-2018-8141 (Windows Kernel Information Disclosure Vulnerability) and CVE-2019-8170 (Windows Image Elevation of Privilege Vulnerability), for which exploitation details became public. Adobe Flash Player also included a patch for a Flash Player vulnerability that was released earlier today.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-may-2018-patch-tuesday-fixes-67-security-issues-including-ie-zero-day/