This month Microsoft has patched 93 vulnerabilities, 27 of which are rated Critical.
Cumulative Security Update for Microsoft Browsers
Chakra Scripting Engine Memory Corruption Vulnerability (CVE-2019-1131) MS Rating: Critical
A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current ..