Microsoft’s September 2025 Patch Tuesday Addresses 80 CVEs (CVE-2025-55234)

On September 9, Microsoft released its September 2025 Patch Tuesday release which patched 80 CVEs with eight rated as critical and 72 rated as important.

While no vulnerabilities were exploited in the wild, there was one zero-day patch this month. CVE-2025-55234 is an elevation of privilege vulnerability affecting Windows Server Message Block (SMB). It was assigned a CVSSv3 score of 8.8 and rated as important. Successful exploitation would allow an unauthenticated attacker to elevate their privileges to that of the compromised user's account.

CVE-2025-55234 appears to have been released to help customers audit and assess their environment and identify incompatibility issues prior to utilizing some of the hardening capabilities for SMB Servers.

This month’s update includes patches for:

• Azure Arc
• Azure Windows Virtual Machine Agent
• Capability Access Management Service (camsvc)
• Graphics Kernel
• Microsoft AutoUpdate (MAU)
• Microsoft Brokering File System
• Microsoft Graphics Component
• Microsoft High Performance Compute Pack (HPC)
• Microsoft Office
• Microsoft Office Excel
• Microsoft Office PowerPoint
• Microsoft Office SharePoint
• Microsoft Office Visio
• Microsoft Office Word
• Microsoft Virtual Hard Drive
• Role: Windows Hyper-V
• SQL Server
• Windows Ancillary Function Driver for WinSock
• Windows BitLocker
• Windows Bluetooth Service
• Windows Connected Devices Platform Service
• Windows DWM
• Windows Defender Firewall Service
• Windows Imaging Component
• Windows Internet Information Services
• Windows Kernel
• Windows Local Security Authority Subsystem Service (LSASS)
• Windows Management Services
• Windows MapUrlToZone
• Windows MultiPoint Services
• Windows NTFS
• Windows NTLM
• Windows PowerShell
• Windows Routing and Remote Access Service (RRAS)
• Windows SMB
• Windows SMBv3 Client
• Windows SPNEGO Extended Negotiation
• Windows TCP/IP
• Windows UI XAML Maps MapControlSettings
• Windows UI XAML Phone DatePickerFlyout
• Windows Win32K GRFX
• Xbox

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