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KB5120233BMonthly security release (Patch Tuesday) · 2026-08 B

Monthly security release (Patch Tuesday) for Windows Server 2025

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

Is it safe to deploy?

Everything in the August 2026 Patch Tuesday cycle
1Windows version
213CVEs fixed · 19 critical
1Exploited or in CISA KEV
0Open known issues affecting it
YesRestart required (per MSRC)

Applies to

From Microsoft's release-information tables
Servicing branchOS buildReleaseAvailable
Windows Server 2025 26100.33296 B 2026-08 B 11 Aug 2026

Known issues in this update

Windows release health

No known issues listed

Windows release health lists no issues from this KB or the update it builds on.

Issues this update resolves

No resolved issues listed

Windows release health names no issues fixed by this KB.

Security fixes

213 Microsoft CVEs · most urgent first
CVE Vulnerability Severity CVSSEPSSImpact Status
CVE-2026-68820 Windows Ancillary Function Driver for WinSock Elevation of Privilege VulnerabilityWindows Ancillary Function Driver for WinSock Important 7.00.3%Elevation of Privilege ExploitedCISA KEV · due 25 Aug
CVE-2026-62832 Windows User Profile Service Elevation of Privilege VulnerabilityWindows User Profile Service Important 7.80.4%Elevation of Privilege Disclosed
CVE-2026-62815 Microsoft QUIC Remote Code Execution VulnerabilityMicrosoft QUIC Critical 9.81.0%Remote Code Execution Revised 3 Sep
CVE-2026-62878 Windows DNS Server Remote Code Execution VulnerabilityWindows DNS Critical 9.81.0%Remote Code Execution Revised 8 Sep
CVE-2026-62893 Windows Deployment Services TFTP Server Remote Code Execution VulnerabilityWindows Deployment Services Critical 9.81.0%Remote Code Execution Revised 8 Sep
CVE-2026-65791 Windows iSCSI Target Service Remote Code Execution VulnerabilityWindows iSCSI Target Service Critical 9.81.0%Remote Code Execution Revised 18 Aug
CVE-2026-62816 Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution VulnerabilityReliable Multicast Transport Driver (RMCAST) Critical 8.80.5%Remote Code Execution
CVE-2026-62817 Windows DNS Server Remote Code Execution VulnerabilityWindows DNS Critical 8.80.5%Remote Code Execution Revised 8 Sep
CVE-2026-62818 Windows Active Directory Certificate Services (AD CS) Remote Code Execution VulnerabilityActive Directory Certificate Services (AD CS) Critical 8.80.9%Remote Code Execution
CVE-2026-62822 Windows GDI+ Remote Code Execution VulnerabilityWindows GDI+ Critical 8.80.8%Remote Code Execution
CVE-2026-62823 Windows DHCP Server Remote Code Execution VulnerabilityWindows DHCP Server Critical 8.80.5%Remote Code Execution Revised 8 Sep
CVE-2026-62819 Windows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityWindows Routing and Remote Access Service (RRAS) Critical 8.10.7%Remote Code Execution Revised 17 Sep
CVE-2026-62820 Windows DNS Server Remote Code Execution VulnerabilityWindows DNS Critical 8.10.5%Remote Code Execution Revised 8 Sep
CVE-2026-62889 Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution VulnerabilityWindows Secure Socket Tunneling Protocol (SSTP) Critical 8.10.7%Remote Code Execution Revised 31 Aug
CVE-2026-65679 Windows iSCSI Target Service Remote Code Execution VulnerabilityWindows iSCSI Target Service Critical 8.10.7%Remote Code Execution Revised 13 Aug
CVE-2026-65789 Windows DNS Server Remote Code Execution VulnerabilityWindows DNS Critical 8.10.7%Remote Code Execution Revised 8 Sep
CVE-2026-65796 Windows iSCSI Target Service Remote Code Execution VulnerabilityWindows iSCSI Target Service Critical 8.10.7%Remote Code Execution Revised 13 Aug
CVE-2026-66802 Windows Device Health Attestation (DHA) Remote Code Execution VulnerabilityWindows Device Health Attestation (DHA) Critical 8.10.5%Remote Code Execution Revised 20 Aug
CVE-2026-71331 Windows Device Health Attestation (DHA) Remote Code Execution VulnerabilityWindows Device Health Attestation (DHA) Critical 8.10.7%Remote Code Execution Revised 20 Aug
CVE-2026-62890 Windows GDI+ Elevation of Privilege VulnerabilityWindows GDI+ Critical 7.80.3%Remote Code Execution Revised 26 Aug
CVE-2026-66799 Windows Key Guard Elevation of Privilege VulnerabilityWindows Key Guard Critical 7.80.3%Elevation of Privilege
CVE-2026-49179 Windows Active Directory Domain Services Remote Code Execution VulnerabilityWindows Active Directory Important 8.80.9%Remote Code Execution
CVE-2026-62784 Microsoft Local Security Authority Server (lsasrv) Remote Code Execution VulnerabilityMicrosoft Local Security Authority Server (lsasrv) Important 8.80.9%Remote Code Execution
CVE-2026-62785 Windows LDAP - Lightweight Directory Access Protocol Remote Code Execution VulnerabilityWindows LDAP - Lightweight Directory Access Protocol Important 8.80.8%Remote Code Execution
CVE-2026-62790 Windows SMBv3 Server Remote Code Execution VulnerabilityWindows SMB Server Important 8.80.9%Remote Code Execution
CVE-2026-62795 Windows LDAP - Lightweight Directory Access Protocol Remote Code Execution VulnerabilityWindows LDAP - Lightweight Directory Access Protocol Important 8.80.8%Remote Code Execution
CVE-2026-62800 Windows SMBv3 Server Remote Code Execution VulnerabilityWindows SMB Server Important 8.80.9%Remote Code Execution
CVE-2026-62778 Windows DNS Elevation of Privilege VulnerabilityWindows DNS Important 8.10.5%Elevation of Privilege
CVE-2026-62781 RPC Runtime Library Remote Code Execution VulnerabilityRPC Runtime Important 8.10.7%Remote Code Execution
CVE-2026-62792 Windows TCP/IP Remote Code Execution VulnerabilityWindows TCP/IP Important 8.10.7%Remote Code Execution
CVE-2026-42976 Remote Access Management service/API (RPC server) Elevation of Privilege VulnerabilityWindows RPC API Important 7.80.3%Elevation of Privilege Revised 12 Aug
CVE-2026-54984 Windows Imaging Component Remote Code Execution VulnerabilityWindows Imaging Component Important 7.80.5%Remote Code Execution
CVE-2026-56174 Windows Narrator Braille Elevation of Privilege VulnerabilityWindows Narrator Braille Important 7.80.5%Elevation of Privilege
CVE-2026-59127 Windows Installer Elevation of Privilege VulnerabilityWindows Installer Important 7.80.3%Elevation of Privilege Revised 25 Aug
CVE-2026-61349 Windows Work Folder Service Elevation of Privilege VulnerabilityWindows Work Folder Service Important 7.80.3%Elevation of Privilege Revised 11 Sep
CVE-2026-61353 Windows Telephony Service Elevation of Privilege VulnerabilityWindows Telephony Service Important 7.80.3%Elevation of Privilege
CVE-2026-61355 Windows Sensor Data Service Elevation of Privilege VulnerabilityWindows Sensor Data Service Important 7.80.3%Elevation of Privilege
CVE-2026-61356 Windows Remote Desktop Services Elevation of Privilege VulnerabilityWindows Remote Desktop Services Important 7.80.3%Elevation of Privilege
CVE-2026-61357 Application Information Services Elevation of Privilege VulnerabilityApplication Information Services Important 7.80.3%Elevation of Privilege
CVE-2026-61358 Windows Accessibility Infrastructure (ATBroker.exe) Elevation of Privilege VulnerabilityWindows Accessibility Infrastructure (ATBroker.exe) Important 7.80.4%Elevation of Privilege
CVE-2026-61359 Windows Storage Elevation of Privilege VulnerabilityWindows Storage Important 7.80.3%Elevation of Privilege Revised 13 Aug
CVE-2026-61364 Windows Remote Desktop Services Elevation of Privilege VulnerabilityWindows Remote Desktop Services Important 7.80.3%Elevation of Privilege
CVE-2026-61365 Windows Remote Desktop Services Elevation of Privilege VulnerabilityWindows Remote Desktop Services Important 7.80.3%Elevation of Privilege
CVE-2026-61367 Windows Remote Desktop Services Elevation of Privilege VulnerabilityWindows Remote Desktop Services Important 7.80.3%Elevation of Privilege
CVE-2026-61923 Windows Display Enhancement Service Elevation of Privilege VulnerabilityWindows Display Enhancement Service Important 7.80.3%Elevation of Privilege Revised 15 Sep
CVE-2026-61925 Windows Installer Elevation of Privilege VulnerabilityWindows Installer Important 7.80.3%Elevation of Privilege
CVE-2026-61926 Windows USB Driver Elevation of Privilege VulnerabilityWindows USB Driver Important 7.80.3%Elevation of Privilege
CVE-2026-61930 Windows Kernel Elevation of Privilege VulnerabilityWindows Kernel Important 7.80.3%Elevation of Privilege
CVE-2026-61934 Windows Bind Filter Driver Elevation of Privilege VulnerabilityWindows Bind Filter Driver Important 7.80.3%Elevation of Privilege
CVE-2026-61937 Windows HTTP.sys Elevation of Privilege VulnerabilityWindows HTTP.sys Important 7.80.3%Elevation of Privilege
Showing 50 of 213All CVEs
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