KB5121003BMonthly security release (Patch Tuesday) · 2026-08 B

Monthly security release (Patch Tuesday) for Windows 11, version 25H2 and Windows 11, version 24H2

Support article Update Catalog CVEs in Security CVE list for a ticket

Is it safe to deploy?

SupersededKB5121003B

Deploy KB5129195 instead; it includes these fixes.

UrgencyCritical · 1 exploited RiskModerate

Everything in the August 2026 Patch Tuesday cycle

2Windows versions

192CVEs fixed · 7 critical

1Exploited or in CISA KEV

0Open known issues affecting it

YesRestart required (per MSRC)

Applies to

From Microsoft's release-information tables

Servicing branch	OS build	Release	Available
Windows 11, version 25H2	26200.9168	B 2026-08 B	11 Aug 2026
Windows 11, version 24H2	26100.9168	B 2026-08 B	11 Aug 2026

Known issues in this update

Windows release health

Resolvedfrom KB5121003 fixed by KB5124008Win 11 25H2, Win 11 24H2updated 8 Sep

Microsoft Teams and Outlook might fail to launch on ARM-based devicesThis most likely occurs on new PCs after installing the August Windows security update and does not affect other apps.
Resolvedfrom KB5121003Win 11 25H2, Win 11 24H2updated 26 Aug

Some games become unresponsive when certain drivers are presentThis issue is related to peripherals with RGB features

Issues this update resolves

No resolved issues listed

Windows release health names no issues fixed by this KB.

Security fixes

192 Microsoft CVEs · most urgent first

CVE	Vulnerability	Severity	CVSS	EPSS	Impact	Status
CVE-2026-68820	Windows Ancillary Function Driver for WinSock Elevation of Privilege VulnerabilityWindows Ancillary Function Driver for WinSock	Important	7.0	0.3%	Elevation of Privilege	ExploitedCISA KEV · due 25 Aug
CVE-2026-62832	Windows User Profile Service Elevation of Privilege VulnerabilityWindows User Profile Service	Important	7.8	0.4%	Elevation of Privilege	Disclosed
CVE-2026-62815	Microsoft QUIC Remote Code Execution VulnerabilityMicrosoft QUIC	Critical	9.8	1.0%	Remote Code Execution	Revised 3 Sep
CVE-2026-62816	Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution VulnerabilityReliable Multicast Transport Driver (RMCAST)	Critical	8.8	0.5%	Remote Code Execution
CVE-2026-62822	Windows GDI+ Remote Code Execution VulnerabilityWindows GDI+	Critical	8.8	0.8%	Remote Code Execution
CVE-2026-62819	Windows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityWindows Routing and Remote Access Service (RRAS)	Critical	8.1	0.7%	Remote Code Execution	Revised 17 Sep
CVE-2026-62889	Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution VulnerabilityWindows Secure Socket Tunneling Protocol (SSTP)	Critical	8.1	0.7%	Remote Code Execution	Revised 31 Aug
CVE-2026-62890	Windows GDI+ Elevation of Privilege VulnerabilityWindows GDI+	Critical	7.8	0.3%	Remote Code Execution	Revised 26 Aug
CVE-2026-66799	Windows Key Guard Elevation of Privilege VulnerabilityWindows Key Guard	Critical	7.8	0.3%	Elevation of Privilege
CVE-2026-49179	Windows Active Directory Domain Services Remote Code Execution VulnerabilityWindows Active Directory	Important	8.8	0.9%	Remote Code Execution
CVE-2026-62784	Microsoft Local Security Authority Server (lsasrv) Remote Code Execution VulnerabilityMicrosoft Local Security Authority Server (lsasrv)	Important	8.8	0.9%	Remote Code Execution
CVE-2026-62785	Windows LDAP - Lightweight Directory Access Protocol Remote Code Execution VulnerabilityWindows LDAP - Lightweight Directory Access Protocol	Important	8.8	0.8%	Remote Code Execution
CVE-2026-62790	Windows SMBv3 Server Remote Code Execution VulnerabilityWindows SMB Server	Important	8.8	0.9%	Remote Code Execution
CVE-2026-62795	Windows LDAP - Lightweight Directory Access Protocol Remote Code Execution VulnerabilityWindows LDAP - Lightweight Directory Access Protocol	Important	8.8	0.8%	Remote Code Execution
CVE-2026-62800	Windows SMBv3 Server Remote Code Execution VulnerabilityWindows SMB Server	Important	8.8	0.9%	Remote Code Execution
CVE-2026-62781	RPC Runtime Library Remote Code Execution VulnerabilityRPC Runtime	Important	8.1	0.7%	Remote Code Execution
CVE-2026-62792	Windows TCP/IP Remote Code Execution VulnerabilityWindows TCP/IP	Important	8.1	0.7%	Remote Code Execution
CVE-2026-42976	Remote Access Management service/API (RPC server) Elevation of Privilege VulnerabilityWindows RPC API	Important	7.8	0.3%	Elevation of Privilege	Revised 12 Aug
CVE-2026-54984	Windows Imaging Component Remote Code Execution VulnerabilityWindows Imaging Component	Important	7.8	0.5%	Remote Code Execution
CVE-2026-59127	Windows Installer Elevation of Privilege VulnerabilityWindows Installer	Important	7.8	0.3%	Elevation of Privilege	Revised 25 Aug
CVE-2026-61349	Windows Work Folder Service Elevation of Privilege VulnerabilityWindows Work Folder Service	Important	7.8	0.3%	Elevation of Privilege	Revised 11 Sep
CVE-2026-61353	Windows Telephony Service Elevation of Privilege VulnerabilityWindows Telephony Service	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-61355	Windows Sensor Data Service Elevation of Privilege VulnerabilityWindows Sensor Data Service	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-61356	Windows Remote Desktop Services Elevation of Privilege VulnerabilityWindows Remote Desktop Services	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-61357	Application Information Services Elevation of Privilege VulnerabilityApplication Information Services	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-61358	Windows Accessibility Infrastructure (ATBroker.exe) Elevation of Privilege VulnerabilityWindows Accessibility Infrastructure (ATBroker.exe)	Important	7.8	0.4%	Elevation of Privilege
CVE-2026-61359	Windows Storage Elevation of Privilege VulnerabilityWindows Storage	Important	7.8	0.3%	Elevation of Privilege	Revised 13 Aug
CVE-2026-61364	Windows Remote Desktop Services Elevation of Privilege VulnerabilityWindows Remote Desktop Services	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-61365	Windows Remote Desktop Services Elevation of Privilege VulnerabilityWindows Remote Desktop Services	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-61367	Windows Remote Desktop Services Elevation of Privilege VulnerabilityWindows Remote Desktop Services	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-61923	Windows Display Enhancement Service Elevation of Privilege VulnerabilityWindows Display Enhancement Service	Important	7.8	0.3%	Elevation of Privilege	Revised 15 Sep
CVE-2026-61925	Windows Installer Elevation of Privilege VulnerabilityWindows Installer	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-61926	Windows USB Driver Elevation of Privilege VulnerabilityWindows USB Driver	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-61930	Windows Kernel Elevation of Privilege VulnerabilityWindows Kernel	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-61934	Windows Bind Filter Driver Elevation of Privilege VulnerabilityWindows Bind Filter Driver	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-61937	Windows HTTP.sys Elevation of Privilege VulnerabilityWindows HTTP.sys	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-62688	Windows MIDI Service Module Elevation of Privileges VulnerabilityWindows MIDI Service Module	Important	7.8	0.3%	Elevation of Privilege	Revised 13 Aug
CVE-2026-62692	Windows Remote Desktop Services Elevation of Privilege VulnerabilityWindows Remote Desktop Services	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-62695	Windows Storage Elevation of Privilege VulnerabilityWindows Storage	Important	7.8	0.3%	Elevation of Privilege	Revised 13 Aug
CVE-2026-62696	Windows Program Compatibility Assistant Service Elevation of Privilege VulnerabilityWindows Program Compatibility Assistant Service	Important	7.8	0.3%	Elevation of Privilege	Revised 12 Aug
CVE-2026-62698	Microsoft Digest Authentication Elevation of Privilege VulnerabilityMicrosoft Digest Authentication	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-62700	Windows NTFS Elevation of Privilege VulnerabilityWindows NTFS	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-62701	Windows Telephony Service Elevation of Privilege VulnerabilityWindows Telephony Service	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-62707	Windows Modern Device Management (MDM) Elevation of Privilege VulnerabilityWindows Modern Device Management (MDM)	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-62710	Windows Device Association Service Elevation of Privilege VulnerabilityWindows Device Association Service	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-62711	Windows Win32k Elevation of Privilege VulnerabilityWindows Win32K	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-62712	Windows Win32k Elevation of Privilege VulnerabilityWindows Win32K	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-62713	Windows Cloud Files Mini Filter Driver Elevation of Privilege VulnerabilityWindows Cloud Files Mini Filter Driver	Important	7.8	0.3%	Elevation of Privilege
CVE-2026-62717	Windows Message Queuing Elevation of Privilege VulnerabilityWindows Message Queuing	Important	7.8	0.3%	Elevation of Privilege	Revised 15 Sep
CVE-2026-62719	Windows Message Queuing Elevation of Privilege VulnerabilityWindows Message Queuing	Important	7.8	0.3%	Elevation of Privilege

Showing 50 of 192All CVEs