Microsoft · Security update · September 8, 2026

KB5122878: September 2026 cumulative update for Windows 10 22H2

KB5122878, released September 8, 2026, fixes 575 CVEs across 6 products. One of them is being exploited (CVE-2026-85880); 1 on CISA KEV. Patch Radar priority: Patch now.

Patch now1 on CISA KEV

CVEs closed

575

49 rated Critical

Exploited

CVE-2026-85880

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.0280

86th percentile

Priority of the 575 CVEs

Patch now 1
                                Urgent 96
                                High 369
                                Routine 109

Applies to

Product
Windows 10 Version 21H2 for 32-bit Systems
Windows 10 Version 21H2 for ARM64-based Systems
Windows 10 Version 21H2 for x64-based Systems
Windows 10 Version 22H2 for 32-bit Systems
Windows 10 Version 22H2 for ARM64-based Systems
Windows 10 Version 22H2 for x64-based Systems

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Patch now	CVE-2026-85880	Windows ALPC	Elevation of Privilege	7.8	0.0039	KEVExploited
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-2026-69769	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-2026-72982	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-2026-77493	Microsoft Graphics Component	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-2026-72959	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
Urgent	CVE-2026-69860	Windows Imaging Component	Remote Code Execution	8.8	0.0082	Exploitation Unlikely
Urgent	CVE-2026-70203	Windows Media Player	Remote Code Execution	8.8	0.0082	Exploitation Less Likely
Urgent	CVE-2026-70586	Windows Paint	Remote Code Execution	8.8	0.0082	Exploitation Unlikely
Urgent	CVE-2026-72960	Windows Media Player	Remote Code Execution	8.8	0.0082	Exploitation Unlikely
Urgent	CVE-2026-72986	Graphic Fonts	Remote Code Execution	8.8	0.0082	Exploitation Less Likely
Urgent	CVE-2026-73006	Microsoft Graphics Component	Remote Code Execution	8.8	0.0082	Exploitation Less Likely
Urgent	CVE-2026-73013	Windows Imaging Component	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/5122878

Our write-up

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

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