Microsoft · ServicingStack update · August 11, 2026
KB5121000: August 2026 cumulative update for Windows 11 22H2
KB5121000, released August 11, 2026, fixes 183 CVEs across 2 products. One of them is being exploited (CVE-2026-68820); 1 on CISA KEV. Patch Radar priority: Patch now.
Patch now1 on CISA KEV1 publicly disclosed
CVEs closed
183
8 rated Critical
Exploited
1
CVE-2026-68820
Exploitation more likely
19
Vendor assessment
Highest EPSS
0.0857
95th percentile
Priority of the 183 CVEs
Patch now 1
Urgent 27
High 102
Routine 53
Applies to
| Product | Build after install |
|---|---|
| Windows 11 Version 26H1 for ARM64-based Systems | 28000.2704 |
| Windows 11 version 26H1 for x64-based Systems | 28000.2704 |
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Patch now | CVE-2026-68820 | Windows Ancillary Function Driver for WinSock | Elevation of Privilege | 7.0 | 0.0857 | KEVExploited |
| Urgent | CVE-2026-59132 | Windows TCP/IP | Denial of Service | 7.5 | 0.0117 | More likely |
| Urgent | CVE-2026-62815 | Microsoft QUIC | Remote Code Execution | 9.8 | 0.0097 | N/A |
| Urgent | CVE-2026-62822 | Windows GDI+ | Remote Code Execution | 8.8 | 0.0082 | Exploitation Less Likely |
| Urgent | CVE-2026-62819 | Windows Routing and Remote Access Service (RRAS) | Remote Code Execution | 8.1 | 0.0071 | Exploitation Less Likely |
| Urgent | CVE-2026-62889 | Windows Secure Socket Tunneling Protocol (SSTP) | Remote Code Execution | 8.1 | 0.0071 | Exploitation Less Likely |
| Urgent | CVE-2026-66802 | Windows Device Health Attestation (DHA) | Remote Code Execution | 8.1 | 0.0054 | Exploitation Less Likely |
| Urgent | CVE-2026-62816 | Reliable Multicast Transport Driver (RMCAST) | Remote Code Execution | 8.8 | 0.0054 | Exploitation Less Likely |
| Urgent | CVE-2026-61358 | Windows Accessibility Infrastructure (ATBroker.exe) | Elevation of Privilege | 7.8 | 0.0037 | More likely |
| Urgent | CVE-2026-61930 | Windows Kernel | Elevation of Privilege | 7.8 | 0.0033 | More likely |
| Urgent | CVE-2026-62696 | Windows Program Compatibility Assistant Service | Elevation of Privilege | 7.8 | 0.0033 | More likely |
| Urgent | CVE-2026-62698 | Microsoft Digest Authentication | Elevation of Privilege | 7.8 | 0.0033 | More likely |
| Urgent | CVE-2026-62712 | Windows Win32K | Elevation of Privilege | 7.8 | 0.0033 | More likely |
| Urgent | CVE-2026-62713 | Windows Cloud Files Mini Filter Driver | Elevation of Privilege | 7.8 | 0.0033 | More likely |
| Urgent | CVE-2026-62735 | Windows HTTP.sys | Elevation of Privilege | 7.8 | 0.0033 | More likely |
| Urgent | CVE-2026-62737 | Windows Kernel | Elevation of Privilege | 7.8 | 0.0033 | More likely |
| Urgent | CVE-2026-62741 | Windows HTTP.sys | Elevation of Privilege | 7.8 | 0.0033 | More likely |
| Urgent | CVE-2026-62783 | Windows Remote Access Connection Manager | Elevation of Privilege | 7.8 | 0.0033 | More likely |
| Urgent | CVE-2026-62888 | Windows DWM Core Library | Elevation of Privilege | 7.8 | 0.0033 | More likely |
| Urgent | CVE-2026-62890 | Windows GDI+ | Remote Code Execution | 7.8 | 0.0033 | Exploitation Less Likely |
| Urgent | CVE-2026-66799 | Windows Key Guard | Elevation of Privilege | 7.8 | 0.0033 | Exploitation Less Likely |
| Urgent | CVE-2026-61925 | Windows Installer | Elevation of Privilege | 7.8 | 0.0030 | More likely |
| Urgent | CVE-2026-61348 | Windows Ancillary Function Driver for WinSock | Elevation of Privilege | 7.0 | 0.0026 | More likely |
| Urgent | CVE-2026-61929 | Windows Kernel | Elevation of Privilege | 7.0 | 0.0026 | More likely |
| Urgent | CVE-2026-62766 | Windows Kerberos | Elevation of Privilege | 7.0 | 0.0026 | More likely |
Showing 1 to 25 of 183
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