Microsoft · Security update · September 8, 2026

KB5122871: September 2026 cumulative update for Windows Server 2025

KB5122871, released September 8, 2026, fixes 687 CVEs across 2 products. One of them is being exploited (CVE-2026-81963); 1 on CISA KEV. Patch Radar priority: Patch now.

Patch now1 on CISA KEV

CVEs closed

687

64 rated Critical

Exploited

CVE-2026-81963

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.0280

86th percentile

Priority of the 687 CVEs

Patch now 1
                                Urgent 109
                                High 441
                                Routine 136

Applies to

Product	Build after install
Windows Server 2025	26100.33438
Windows Server 2025 (Server Core installation)	26100.33438

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Patch now	CVE-2026-81963	Windows Update Stack	Elevation of Privilege	7.8	0.0039	KEVExploited
Urgent	CVE-2026-69845	Windows DHCP Server	Remote Code Execution	9.8	0.0102	Exploitation Less Likely
Urgent	CVE-2026-69525	Windows Remote Desktop Services	Remote Code Execution	9.8	0.0097	More likely
Urgent	CVE-2026-69579	Windows Message Queuing	Remote Code Execution	9.8	0.0097	Exploitation Unlikely
Urgent	CVE-2026-69590	Windows Routing and Remote Access Service (RRAS)	Remote Code Execution	9.8	0.0097	Exploitation Less Likely
Urgent	CVE-2026-69595	Windows Services for NFS ONCRPC XDR Driver	Remote Code Execution	9.8	0.0097	Exploitation Less Likely
Urgent	CVE-2026-69730	Windows DNS	Remote Code Execution	9.8	0.0097	More likely
Urgent	CVE-2026-69769	Windows HTTP Print Provider	Remote Code Execution	9.8	0.0097	Exploitation Unlikely
Urgent	CVE-2026-69829	Windows Shell	Remote Code Execution	9.8	0.0097	Exploitation Unlikely
Urgent	CVE-2026-70296	Windows Imaging Component	Remote Code Execution	9.8	0.0097	Exploitation Less Likely
Urgent	CVE-2026-72979	Windows DHCP Server	Remote Code Execution	9.8	0.0097	Exploitation Less Likely
Urgent	CVE-2026-72982	Windows Netlogon	Remote Code Execution	9.8	0.0097	Exploitation Unlikely
Urgent	CVE-2026-72983	Windows Internet Connection Sharing (ICS)	Remote Code Execution	9.8	0.0097	Exploitation Less Likely
Urgent	CVE-2026-73009	Windows Secure Socket Tunneling Protocol (SSTP)	Remote Code Execution	9.8	0.0097	Exploitation Less Likely
Urgent	CVE-2026-73010	Windows Failover Cluster	Remote Code Execution	9.8	0.0097	Exploitation Less Likely
Urgent	CVE-2026-77493	Microsoft Graphics Component	Remote Code Execution	9.8	0.0097	Exploitation Less Likely
Urgent	CVE-2026-78445	Windows Services for NFS ONCRPC XDR Driver	Remote Code Execution	9.8	0.0097	Exploitation Less Likely
Urgent	CVE-2026-72950	Windows Routing and Remote Access Service (RRAS)	Remote Code Execution	8.8	0.0092	Exploitation Unlikely
Urgent	CVE-2026-69712	Windows Key Distribution Center	Remote Code Execution	8.8	0.0091	Exploitation Less Likely
Urgent	CVE-2026-72959	Windows Routing and Remote Access Service (RRAS)	Remote Code Execution	8.8	0.0091	Exploitation Less Likely
Urgent	CVE-2026-69723	Windows Kernel	Information Disclosure	5.7	0.0089	More likely
Urgent	CVE-2026-81955	Microsoft Graphics Component	Remote Code Execution	8.8	0.0084	Exploitation Unlikely
Urgent	CVE-2026-69499	Windows Imaging Component	Remote Code Execution	8.8	0.0082	Exploitation Less Likely
Urgent	CVE-2026-69518	Windows Remote Desktop	Remote Code Execution	8.8	0.0082	Exploitation Less Likely
Urgent	CVE-2026-69601	Microsoft Windows Media Foundation	Remote Code Execution	8.8	0.0082	Exploitation Less Likely

Released the same day

KB4011160
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB5002644
Microsoft Publisher 2016 (32-bit edition), Microsoft Publisher 2016 (64-bit edition)
KB5002898
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB5002904
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB5002908
Microsoft SharePoint Server Subscription Edition
KB5002910
Office Online Server
KB5002912
Microsoft Access 2016 (32-bit edition), Microsoft Access 2016 (64-bit edition)
KB5002913
Microsoft Access 2016 (32-bit edition), Microsoft Access 2016 (64-bit edition), Microsoft Office 2016 (32-bit edition) and 1 more
KB5002914
Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition)
KB5002916
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition), Microsoft Word 2016 (32-bit edition) and 1 more
KB5002919
Microsoft Outlook 2016 (32-bit edition), Microsoft Outlook 2016 (64-bit edition)
KB5002920
Microsoft PowerPoint 2016 (32-bit edition), Microsoft PowerPoint 2016 (64-bit edition)

Vendor advisory

https://support.microsoft.com/help/5122871

Our write-up

September 2026 Patch Tuesday: The Update Pipeline Was the Attack Surface

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