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Microsoft has announced the security updates for May 2023.

Security Update Guide - Microsoft Security Response Center

This release consists of the following 40 Microsoft CVEs:

Tag CVE Base Score
Microsoft Teams CVE-2023-24881 6.5
Windows SMB CVE-2023-24898 7.5
Microsoft Graphics Component CVE-2023-24899 7.0
Windows NTLM CVE-2023-24900 5.9
Windows NFS Portmapper CVE-2023-24901 7.5
Windows Win32K CVE-2023-24902 7.8
Windows Secure Socket Tunneling Protocol (SSTP) CVE-2023-24903 8.1
Windows Installer CVE-2023-24904 7.1
Remote Desktop Client CVE-2023-24905 7.8
Windows Secure Boot CVE-2023-24932 6.2
Windows NFS Portmapper CVE-2023-24939 7.5
Reliable Multicast Transport Driver (RMCAST) CVE-2023-24940 7.5
Windows Network File System CVE-2023-24941 9.8
Windows Remote Procedure Call Runtime CVE-2023-24942 7.5
Reliable Multicast Transport Driver (RMCAST) CVE-2023-24943 9.8
Microsoft Bluetooth Driver CVE-2023-24944 6.5
Windows iSCSI Target Service CVE-2023-24945 5.5
Windows Backup Engine CVE-2023-24946 7.8
Microsoft Bluetooth Driver CVE-2023-24947 8.8
Microsoft Bluetooth Driver CVE-2023-24948 7.4
Windows Kernel CVE-2023-24949 7.8
Microsoft Office SharePoint CVE-2023-24950 8.8
Microsoft Office Excel CVE-2023-24953 7.8
Microsoft Office SharePoint CVE-2023-24954 6.5
Microsoft Office SharePoint CVE-2023-24955 7.2
Windows Secure Boot CVE-2023-28251 5.5
Windows LDAP - Lightweight Directory Access Protocol CVE-2023-28283 8.1
Windows RDP Client CVE-2023-28290 5.5
Windows MSHTML Platform CVE-2023-29324 7.5
Windows OLE CVE-2023-29325 8.1
Microsoft Office Access CVE-2023-29333 3.3
Microsoft Office Word CVE-2023-29335 7.5
Windows Win32K CVE-2023-29336 7.8
Visual Studio Code CVE-2023-29338 5.0
Microsoft Windows Codecs Library CVE-2023-29340 7.8
Microsoft Windows Codecs Library CVE-2023-29341 7.8
SysInternals CVE-2023-29343 7.8
Microsoft Office CVE-2023-29344 7.8
Microsoft Edge (Chromium-based) CVE-2023-29350 7.5
Microsoft Edge (Chromium-based) CVE-2023-29354 4.7

We are republising 9 non-Microsoft CVEs:

CNA Tag CVE FAQs? Workarounds? Mitigations?
Chrome Microsoft Edge (Chromium-based) CVE-2023-2459 Yes No No
Chrome Microsoft Edge (Chromium-based) CVE-2023-2460 Yes No No
Chrome Microsoft Edge (Chromium-based) CVE-2023-2462 Yes No No
Chrome Microsoft Edge (Chromium-based) CVE-2023-2463 Yes No No
Chrome Microsoft Edge (Chromium-based) CVE-2023-2464 Yes No No
Chrome Microsoft Edge (Chromium-based) CVE-2023-2465 Yes No No
Chrome Microsoft Edge (Chromium-based) CVE-2023-2466 Yes No No
Chrome Microsoft Edge (Chromium-based) CVE-2023-2467 Yes No No
Chrome Microsoft Edge (Chromium-based) CVE-2023-2468 Yes No No

Security Update Guide Blog Posts

Date Blog Post
January 11, 2022 Coming Soon: New Security Update Guide Notification System
February 9, 2021 Continuing to Listen: Good News about the Security Update Guide API
January 13, 2021 Security Update Guide Supports CVEs Assigned by Industry Partners
December 8, 2020 Security Update Guide: Let’s keep the conversation going
November 9, 2020 Vulnerability Descriptions in the New Version of the Security Update Guide

Relevant Resources

  • The new Hotpatching feature is now generally available. Please see  Hotpatching feature for Windows Server Azure Edition virtual machines (VMs) for more information.
  • Windows 10 and Windows 11 updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows 10, in addition to non-security updates. The updates are available via the  Microsoft Update Catalog. For information on lifecycle and support dates for Windows 10 operating systems, please see  Windows Lifecycle Facts Sheet.
  • Microsoft is improving Windows Release Notes. For more information, please see  What's next for Windows release notes.
  • A list of the latest servicing stack updates for each operating system can be found in  ADV990001. This list will be updated whenever a new servicing stack update is released. It is important to install the latest servicing stack update.
  • In addition to security changes for the vulnerabilities, updates include defense-in-depth updates to help improve security-related features.
  • Customers running Windows 7, Windows Server 2008 R2, or Windows Server 2008 need to purchase the Extended Security Update to continue receiving security updates. See  4522133 for more information.

Known Issues

You can see these in more detail from the Deployments tab by selecting Known Issues column in the Edit Columns panel.

For more information about Windows Known Issues, please see  Windows message center (links to currently-supported versions of Windows are in the left pane).

KB Article Applies To
5026361 Windows 10, version 20H2, Windows 10, version 21H2, Windows 10, version 22H2
5026362 Windows 10, Version 1809, Windows Server 2019
5026368 Windows 11 version 21H2
5026370 Windows Server 2022
5026372 Windows 11 version 22H2
5026408 Windows Server 2008 (Monthly Rollup)
5026413 Windows Server 2008 R2 (Monthly Rollup)
5026426 Windows Server 2008 R2 (Security-only update)
5026427 Windows Server 2008 (Security-only update)

Released: May 9, 2023


Security Update Guide - Microsoft Security Response Center