Security News > 2021 > July > Microsoft Crushes 116 Bugs, Three Actively Exploited
Microsoft tackles 12 critical bugs, part of its July 2021 Patch Tuesday roundup, capping a 'PrintNightmare' month of headaches for system admins.
Three bugs under active exploit were squashed by Microsoft Tuesday, part of its July security roundup of fixes for Windows, Microsoft Office, SharePoint Server and Exchange Server.
Bugs under active attack include a critical scripting engine memory corruption flaw and two additional Windows kernel elevation-of-privilege vulnerabilities, both with a severity rating of important.
Five of the bugs patched by Microsoft were publicly known, albeit not exploited.
Only one of those bugs, a Microsoft Exchange Server remote code execution vulnerability, has a severity rating of critical, with a CVSS score of 9.1.
Researchers have also identified three SharePoint Server bugs as priority patches.