The Microsoft June 2023 security updates have been released and consist of 69 new patches as well as 25 CVEs previously released by third parties and are documented in the Security Updates Guide. Of the CVEs released, 6 are rated critical, 62 are rated important, and one is rated moderate in severity. At the time of release, none are listed as being under active attack or as publicly known.
The security updates apply to the following products, features and roles: Microsoft Windows and Windows Components; Office and Office Components; Exchange Server; Microsoft Edge (Chromium-based); SharePoint Server; .NET and Visual Studio; Microsoft Teams; Azure DevOps; Microsoft Dynamics; and the Remote Desktop Client.
Information regarding mitigations and/or workarounds is available at the May 2023 Security Updates - Release Notes - Security Update Guide - Microsoft. For specific information on Windows 11, version 22H2, see KB5027231 and KB5027223 for Windows 10, Version 21H2.
Reminder: There are no more optional, non-security preview releases for the supported editions of Windows 10, version 20H2 and Windows 10, version 21H2. Only cumulative monthly security updates (known as the "B" or Update Tuesday release) will continue for these versions. Windows 10, version 22H2 will continue to receive security and optional releases.
Recommended Reading: See Dustin Childs review and analysis in Zero Day Initiative -- The June 2023 Security Update Review.
Additional Update Notes:
- MSRT -- The Malicious Software Removal Tool is now run on a quarterly basis rather than monthly. See Remove specific prevalent malware with Windows Malicious Software Removal Tool.
- Servicing Stack Updates -- Microsoft now combines the latest servicing stack update (SSU) for your operating system with the Latest Cumulative Updates (LCU). For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.
- Windows updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows, in addition to non-security updates. The updates are also available via search for the KB number in the Microsoft Update Catalog.
- For information on lifecycle and support dates for Windows 10 and Windows 11 operating systems, please see Windows 10 Home and Pro - Microsoft Lifecycle | Microsoft Docs and Windows 11 Home and Pro (Version 21H2) - Microsoft Lifecycle | Microsoft Docs.
- Windows Update History:
References
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