The Microsoft July 2021 security updates have been released and consist of 117 CVEs. Of these CVEs, 13 are rated Critical, 103 are rated Important, and one is rated moderate in severity.
According to Microsoft, six of these bugs are publicly known and four are under active attack at the time of release.
The updates apply to the following products: Microsoft Windows, Dynamics, Exchange Server, Microsoft Office, Windows Storage Spaces Controller, Bing, SharePoint Server, Internet Explorer (IE), Visual Studio, and OpenEnclave.
See the KBs listed at June 2021 Security Updates - Release Notes - Security Update Guide - Microsoft (https://msrc.microsoft.com/update-guide/releaseNote/2021-Jul) for information regarding known issues with the security updates.
Recommended Reading: See Dustin Childs review and analysis in Zero Day Initiative -- The July 2021 Security Update Review (https://www.zerodayinitiative.com/blog/2021/7/13/the-july-2021-security-update-review).
- Servicing Stack Updates -- Microsoft now combines the latest servicing stack update (SSU) for your operating system with the latest LCU. For general information about SSUs, see Servicing stack updates (https://docs.microsoft.com/en-us/windows/deployment/update/servicing-stack-updates) and Servicing Stack Updates (SSU): Frequently Asked Questions (https://support.microsoft.com/en-us/topic/servicing-stack-updates-ssu-frequently-asked-questions-06b62771-1cb0-368c-09cf-87c4efc4f2fe).
- Security Updates Guide (https://portal.msrc.microsoft.com/en-us/security-guidance/releasenotedetail/2021-July)