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The Update Bureau
Security

KB5120242: all 195 vulnerabilities

Cumulative update for Windows Server, version 2022, August 2026. The update page explains it and lists only the exploited, publicly disclosed and critical vulnerabilities; here are all of them, most severe first.

Vulnerabilities fixed

195 vulnerabilities fixed
1 exploited 19 critical 176 important
VulnerabilitySeverityCVSS
CVE-2026-68820 Exploited
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Important 7.0
Microsoft QUIC Remote Code Execution Vulnerability
Critical 9.8
Windows DNS Server Remote Code Execution Vulnerability
Critical 9.8
Windows Deployment Services TFTP Server Remote Code Execution Vulnerability
Critical 9.8
Windows iSCSI Target Service Remote Code Execution Vulnerability
Critical 9.8
Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability
Critical 8.8
Windows DNS Server Remote Code Execution Vulnerability
Critical 8.8
Windows Active Directory Certificate Services (AD CS) Remote Code Execution Vulnerability
Critical 8.8
Windows GDI+ Remote Code Execution Vulnerability
Critical 8.8
Windows DHCP Server Remote Code Execution Vulnerability
Critical 8.8
Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
Critical 8.1
Windows DNS Server Remote Code Execution Vulnerability
Critical 8.1
Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability
Critical 8.1
Windows iSCSI Target Service Remote Code Execution Vulnerability
Critical 8.1
Windows DNS Server Remote Code Execution Vulnerability
Critical 8.1
Windows iSCSI Target Service Remote Code Execution Vulnerability
Critical 8.1
Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability
Critical 8.1
Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability
Critical 8.1
Windows GDI+ Elevation of Privilege Vulnerability
Critical 7.8
Windows Key Guard Elevation of Privilege Vulnerability
Critical 7.8
Windows Active Directory Domain Services Remote Code Execution Vulnerability
Important 8.8
Microsoft Local Security Authority Server (lsasrv) Remote Code Execution Vulnerability
Important 8.8
Windows LDAP - Lightweight Directory Access Protocol Remote Code Execution Vulnerability
Important 8.8
Windows SMBv3 Server Remote Code Execution Vulnerability
Important 8.8
Windows LDAP - Lightweight Directory Access Protocol Remote Code Execution Vulnerability
Important 8.8
Windows SMBv3 Server Remote Code Execution Vulnerability
Important 8.8
Windows DNS Elevation of Privilege Vulnerability
Important 8.1
RPC Runtime Library Remote Code Execution Vulnerability
Important 8.1
Windows TCP/IP Remote Code Execution Vulnerability
Important 8.1
MITRE: CVE-2026-6726 TPM 2.0 Improper Object Slot Reuse
Important 7.9
Remote Access Management service/API (RPC server) Elevation of Privilege Vulnerability
Important 7.8
Windows Imaging Component Remote Code Execution Vulnerability
Important 7.8
Windows Narrator Braille Elevation of Privilege Vulnerability
Important 7.8
Windows Installer Elevation of Privilege Vulnerability
Important 7.8
Windows Work Folder Service Elevation of Privilege Vulnerability
Important 7.8
Windows Telephony Service Elevation of Privilege Vulnerability
Important 7.8
Windows Sensor Data Service Elevation of Privilege Vulnerability
Important 7.8
Windows Remote Desktop Services Elevation of Privilege Vulnerability
Important 7.8
Windows Accessibility Infrastructure (ATBroker.exe) Elevation of Privilege Vulnerability
Important 7.8
Windows Storage Elevation of Privilege Vulnerability
Important 7.8
Windows Remote Desktop Services Elevation of Privilege Vulnerability
Important 7.8
Windows Remote Desktop Services Elevation of Privilege Vulnerability
Important 7.8
Windows Remote Desktop Services Elevation of Privilege Vulnerability
Important 7.8
Windows Display Enhancement Service Elevation of Privilege Vulnerability
Important 7.8
Windows Installer Elevation of Privilege Vulnerability
Important 7.8
Windows USB Driver Elevation of Privilege Vulnerability
Important 7.8
Windows Kernel Elevation of Privilege Vulnerability
Important 7.8
Windows DWM Core Library Elevation of Privilege Vulnerability
Important 7.8
Windows HTTP.sys Elevation of Privilege Vulnerability
Important 7.8
Windows Remote Desktop Services Elevation of Privilege Vulnerability
Important 7.8
Windows Storage Elevation of Privilege Vulnerability
Important 7.8
Windows Program Compatibility Assistant Service Elevation of Privilege Vulnerability
Important 7.8
Microsoft Digest Authentication Elevation of Privilege Vulnerability
Important 7.8
Windows NTFS Elevation of Privilege Vulnerability
Important 7.8
Windows Telephony Service Elevation of Privilege Vulnerability
Important 7.8
Windows Modern Device Management (MDM) Elevation of Privilege Vulnerability
Important 7.8
Windows Device Association Service Elevation of Privilege Vulnerability
Important 7.8
Windows Win32k Elevation of Privilege Vulnerability
Important 7.8
Windows Win32k Elevation of Privilege Vulnerability
Important 7.8
Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
Important 7.8
Windows Message Queuing Elevation of Privilege Vulnerability
Important 7.8
Windows Message Queuing Elevation of Privilege Vulnerability
Important 7.8
Windows User-Mode Power Service (UMPS) Elevation of Privilege Vulnerability
Important 7.8
Windows Telephony Service Elevation of Privilege Vulnerability
Important 7.8
Windows Win32k Elevation of Privilege Vulnerability
Important 7.8
Windows HTTP.sys Elevation of Privilege Vulnerability
Important 7.8
Windows HTTP.sys Elevation of Privilege Vulnerability
Important 7.8
Windows HTTP.sys Elevation of Privilege Vulnerability
Important 7.8
Windows Device Association Service Elevation of Privilege Vulnerability
Important 7.8
Windows Projected File System Elevation of Privilege Vulnerability
Important 7.8
Windows Kerberos Elevation of Privilege Vulnerability
Important 7.8
Windows Kerberos Elevation of Privilege Vulnerability
Important 7.8
Windows DHCP Client Elevation of Privilege Vulnerability
Important 7.8
Windows Remote Access Connection Manager Elevation of Privilege Vulnerability
Important 7.8
Windows DHCP Server Elevation of Privilege Vulnerability
Important 7.8
Windows Installer Elevation of Privilege Vulnerability
Important 7.8
Windows Shell Elevation of Privilege Vulnerability
Important 7.8
Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
Important 7.8
Windows DHCP Server Elevation of Privilege Vulnerability
Important 7.8
Windows License Manager Elevation of Privilege Vulnerability
Important 7.8
Windows Remote Access Connection Manager Elevation of Privilege Vulnerability
Important 7.8
Windows NTFS Elevation of Privilege Vulnerability
Important 7.8
Windows DHCP Server Elevation of Privilege Vulnerability
Important 7.8
Windows DHCP Server Elevation of Privilege Vulnerability
Important 7.8
Windows HTTP.sys Elevation of Privilege Vulnerability
Important 7.8
Windows DHCP Server Elevation of Privilege Vulnerability
Important 7.8
Windows User Profile Service Elevation of Privilege Vulnerability
Important 7.8
Windows Win32k Elevation of Privilege Vulnerability
Important 7.8
Windows Win32k Elevation of Privilege Vulnerability
Important 7.8
Windows NTFS Elevation of Privilege Vulnerability
Important 7.8
Windows Win32k Elevation of Privilege Vulnerability
Important 7.8
Windows DWM Core Library Elevation of Privilege Vulnerability
Important 7.8
Windows DWM Core Library Elevation of Privilege Vulnerability
Important 7.8
Remote Access API Elevation of Privilege Vulnerability
Important 7.8
Remote Access API Elevation of Privilege Vulnerability
Important 7.8
Windows Kernel Elevation of Privilege Vulnerability
Important 7.8
Windows Installer Elevation of Privilege Vulnerability
Important 7.8
Windows Win32k Elevation of Privilege Vulnerability
Important 7.8
Desktop Window Manager Elevation of Privilege Vulnerability
Important 7.8
Desktop Window Manager Elevation of Privilege Vulnerability
Important 7.8
Windows Message Queuing Elevation of Privilege Vulnerability
Important 7.8
Microsoft Windows Storage Port Driver Elevation of Privilege Vulnerability
Important 7.8
Windows Installer Elevation of Privilege Vulnerability
Important 7.8
Windows Installer Elevation of Privilege Vulnerability
Important 7.8
Windows Installer Elevation of Privilege Vulnerability
Important 7.8
Windows Installer Elevation of Privilege Vulnerability
Important 7.8
Remote Procedure Call Denial of Service Vulnerability
Important 7.5
Windows TCP/IP Denial of Service Vulnerability
Important 7.5
Remote Desktop Client Remote Code Execution Vulnerability
Important 7.5
Remote Desktop Client Remote Code Execution Vulnerability
Important 7.5
Remote Desktop Client Remote Code Execution Vulnerability
Important 7.5
Windows DNS Server Remote Code Execution Vulnerability
Important 7.5
Windows iSCSI Target Service Denial of Service Vulnerability
Important 7.5
Windows LUA File Virtualization Filter Driver Elevation of Privilege Vulnerability
Important 7.0
Windows Telephony Service Elevation of Privilege Vulnerability
Important 7.0
Virtual Hard Disk (VHD) Miniport Driver Elevation of Privilege Vulernability
Important 7.0
Windows Event Logging Service Elevation of Privilege Vulnerability
Important 7.0
Windows Graphics Kernel Elevation of Privilege Vulnerability
Important 7.0
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Important 7.0
Windows Network Connection Broker Elevation of Privilege Vulnerability
Important 7.0
Winlogon Elevation of Privilege Vulnerability
Important 7.0
Windows Push Notifications Elevation of Privilege Vulnerability
Important 7.0
Windows Telephony Service Elevation of Privilege Vulnerability
Important 7.0
Windows Telephony Service Elevation of Privilege Vulnerability
Important 7.0
Windows Telephony Service Elevation of Privilege Vulnerability
Important 7.0
Windows Telephony Service Elevation of Privilege Vulnerability
Important 7.0
Windows Telephony Service Elevation of Privilege Vulnerability
Important 7.0
Windows Common Log File System Driver Elevation of Privilege Vulnerability
Important 7.0
Windows Telephony Service Elevation of Privilege Vulnerability
Important 7.0
Windows Telephony Service Elevation of Privilege Vulnerability
Important 7.0
Windows Telephony Service Elevation of Privilege Vulnerability
Important 7.0
Windows HTTP.sys Elevation of Privilege Vulnerability
Important 7.0
Windows Kerberos Elevation of Privilege Vulnerability
Important 7.0
Windows Graphics Kernel Elevation of Privilege Vulnerability
Important 7.0
Capability Access Management Service (camsvc) Elevation of Privilege Vulnerability
Important 7.0
Windows Backup Engine Elevation of Privilege Vulnerability
Important 7.0
Windows Win32k Elevation of Privilege Vulnerability
Important 7.0
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Important 7.0
Windows Universal Disk Format File System Driver (UDFS) Remote Code Execution Vulnerability
Important 6.8
Windows Graphics Kernel Denial of Service Vulnerability
Important 6.8
Windows DNS Elevation of Privilege Vulnerability
Important 6.7
Windows DNS Elevation of Privilege Vulnerability
Important 6.7
Windows DNS Elevation of Privilege Vulnerability
Important 6.7
Windows DNS Elevation of Privilege Vulnerability
Important 6.7
Windows DNS Elevation of Privilege Vulnerability
Important 6.7
Windows DNS Elevation of Privilege Vulnerability
Important 6.7
Windows DNS Elevation of Privilege Vulnerability
Important 6.7
Windows DNS Elevation of Privilege Vulnerability
Important 6.7
Windows DNS Elevation of Privilege Vulnerability
Important 6.7
Windows DNS Server Remote Code Execution Vulnerability
Important 6.6
Microsoft Remote Registry Service Denial of Service Vulnerability
Important 6.5
Microsoft Remote Registry Service Denial of Service Vulnerability
Important 6.5
Windows Remote Desktop Client Information Disclosure Vulnerability
Important 6.5
Windows Remote Desktop Client Information Disclosure Vulnerability
Important 6.5
Windows Remote Desktop Client Information Disclosure Vulnerability
Important 6.5
Windows DHCP Server Information Disclosure Vulnerability
Important 6.5
Windows DHCP Server Information Disclosure Vulnerability
Important 6.5
Windows DHCP Server Information Disclosure Vulnerability
Important 6.5
Windows DHCP Server Information Disclosure Vulnerability
Important 6.5
Windows DHCP Server Information Disclosure Vulnerability
Important 6.5
Windows DHCP Server Information Disclosure Vulnerability
Important 6.5
Windows DHCP Server Information Disclosure Vulnerability
Important 6.5
Windows HTTP Protocol Stack Tampering Vulnerability
Important 6.5
Windows SMB Client Information Disclosure Vulnerability
Important 6.5
Windows DHCP Server Information Disclosure Vulnerability
Important 6.5
Windows SMB Client Information Disclosure Vulnerability
Important 6.5
MITRE: CVE-2026-6727 TPM 2.0 RSA OAEP Timing Side-Channel Vulnerability
Important 5.9
Windows Network File System Denial of Service Vulnerability
Important 5.9
AMD Zen Information Disclosure Vulnerability
Important 5.6
AMD Zen Information Disclosure Vulnerability
Important 5.6
Windows Encrypting File System (EFS) Information Disclosure Vulnerability
Important 5.5
Microsoft Windows Search Component Information Disclosure Vulnerability
Important 5.5
Microsoft COM for Windows Information Disclosure Vulnerability
Important 5.5
Windows Event Logging Service Information Disclosure Vulnerability
Important 5.5
Windows Event Logging Service Information Disclosure Vulnerability
Important 5.5
Windows GDI Information Disclosure Vulnerability
Important 5.5
Windows Hello Tampering Vulnerability
Important 5.5
Windows Defender Firewall Service Security Feature Bypass Vulnerability
Important 5.5
Windows DWM Core Library Information Disclosure Vulnerability
Important 5.5
Windows GDI+ Information Disclosure Vulnerability
Important 5.5
Windows Wired AutoConfig Service Information Disclosure Vulnerability
Important 5.5
Windows Management Instrumentation Information Disclosure Vulnerability
Important 5.5
Windows Imaging Component Information Disclosure Vulnerability
Important 5.5
Win32k Information Disclosure Vulnerability
Important 5.5
Win32k Information Disclosure Vulnerability
Important 5.5
Win32k Information Disclosure Vulnerability
Important 5.5
Windows NTFS Information Disclosure Vulnerability
Important 5.5
Windows NTFS Information Disclosure Vulnerability
Important 5.5
Windows NTFS Information Disclosure Vulnerability
Important 5.5
Windows GDI Information Disclosure Vulnerability
Important 5.5
Windows NTFS Information Disclosure Vulnerability
Important 5.5
Windows Schannel Security Feature Bypass Vulnerability
Important 5.3
Active Directory Security Feature Bypass Vulnerability
Important 5.3
Windows Hyper-V Information Disclosure Vulnerability
Important 5.0
Windows NTFS Information Disclosure Vulnerability
Important 4.6