Summary

Microsoft's May 2026 Patch Tuesday addressed 120 security flaws, including 17 critical vulnerabilities (14 remote code execution, 2 elevation of privilege, and 1 information disclosure) affecting Windows, Office, SharePoint, .NET, and other components. Critical fixes include preview-pane-exploitable RCEs in Word and Office, along with flaws in Windows DNS Client, Netlogon, Hyper-V, and SharePoint Server.

Take Action:

This month prioritize Microsoft Office, Word, and Excel for the critical remote code execution flaws exploitable via the preview pane, then Windows OS and SharePoint Server for the remaining critical RCE vulnerabilities. Then go through the rest of the products.

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