Microsoft · Security update · September 8, 2026
KB5122871: September 2026 cumulative update for Windows Server 2025
KB5122871, released September 8, 2026, fixes 687 CVEs across 2 products. One of them is being exploited (CVE-2026-81963); 1 on CISA KEV. Patch Radar priority: Patch now.
Patch now1 on CISA KEV
CVEs closed
687
64 rated Critical
Exploited
1
CVE-2026-81963
Exploitation more likely
51
Vendor assessment
Highest EPSS
0.0280
86th percentile
Priority of the 687 CVEs
Patch now 1
Urgent 109
High 441
Routine 136
Applies to
| Product | Build after install |
|---|---|
| Windows Server 2025 | 26100.33438 |
| Windows Server 2025 (Server Core installation) | 26100.33438 |
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Patch now | CVE-2026-81963 | Windows Update Stack | Elevation of Privilege | 7.8 | 0.0039 | KEVExploited |
| Urgent | CVE-2026-69845 | Windows DHCP Server | Remote Code Execution | 9.8 | 0.0102 | Exploitation Less Likely |
| 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-2026-69595 | Windows Services for NFS ONCRPC XDR Driver | Remote Code Execution | 9.8 | 0.0097 | Exploitation Less Likely |
| Urgent | CVE-2026-69730 | Windows DNS | Remote Code Execution | 9.8 | 0.0097 | More 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-2026-72979 | Windows DHCP Server | 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-2026-73010 | Windows Failover Cluster | 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-2026-78445 | Windows Services for NFS ONCRPC XDR Driver | 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-2026-69712 | Windows Key Distribution Center | Remote Code Execution | 8.8 | 0.0091 | Exploitation Less Likely |
| 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 |
Showing 1 to 25 of 687
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