Microsoft · Security update · May 12, 2026
KB5087537: May 2026 cumulative update for Windows 10 1607
KB5087537, released May 12, 2026, fixes 47 CVEs across 4 products. None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
47
4 rated Critical
Exploited
0
None reported
Exploitation more likely
4
Microsoft's assessment
Highest EPSS
0.7834
99th percentile
Priority of the 47 CVEs
Patch now 0
Urgent 8
High 32
Routine 7
Applies to
| Product | Build after install |
|---|---|
| Windows 10 Version 1607 for 32-bit Systems | 14393.9140 |
| Windows 10 Version 1607 for x64-based Systems | 14393.9140 |
| Windows Server 2016 | 14393.9140 |
| Windows Server 2016 (Server Core installation) | 14393.9140 |
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Urgent | CVE-2026-41089 | Windows Netlogon | Remote Code Execution | 9.8 | 0.7834 | Exploitation Less Likely |
| Urgent | CVE-2026-40398 | Windows Remote Desktop | Elevation of Privilege | 7.8 | 0.0267 | More likely |
| Urgent | CVE-2026-33837 | Windows TCP/IP | Elevation of Privilege | 7.8 | 0.0184 | More likely |
| Urgent | CVE-2026-35416 | Windows Ancillary Function Driver for WinSock | Elevation of Privilege | 7.0 | 0.0165 | More likely |
| Urgent | CVE-2026-35421 | Windows GDI | Remote Code Execution | 7.8 | 0.0053 | Exploitation Unlikely |
| Urgent | CVE-2026-40403 | Windows Win32K - GRFX | Remote Code Execution | 8.8 | 0.0043 | Exploitation Less Likely |
| Urgent | CVE-2026-32161 | Windows Native WiFi Miniport Driver | Remote Code Execution | 7.5 | 0.0030 | Exploitation Less Likely |
| Urgent | CVE-2026-40397 | Windows Common Log File System Driver | Elevation of Privilege | 7.8 | 0.0027 | More likely |
| High | CVE-2026-35424 | Windows Internet Key Exchange (IKE) Protocol | Denial of Service | 7.5 | 0.0119 | Exploitation Unlikely |
| High | CVE-2026-40406 | Windows TCP/IP | Information Disclosure | 7.5 | 0.0093 | Exploitation Less Likely |
| High | CVE-2026-40414 | Windows TCP/IP | Denial of Service | 7.4 | 0.0053 | Exploitation Unlikely |
| High | CVE-2026-34329 | Windows Message Queuing | Remote Code Execution | 8.8 | 0.0046 | Exploitation Less Likely |
| High | CVE-2026-40413 | Windows TCP/IP | Denial of Service | 7.4 | 0.0040 | Exploitation Less Likely |
| High | CVE-2026-33838 | Windows Message Queuing | Elevation of Privilege | 7.8 | 0.0040 | Exploitation Less Likely |
| High | CVE-2026-35415 | Windows Storage Spaces Controller | Elevation of Privilege | 7.8 | 0.0033 | Exploitation Less Likely |
| High | CVE-2026-41095 | Data Deduplication | Elevation of Privilege | 7.8 | 0.0033 | Exploitation Less Likely |
| High | CVE-2026-40401 | Windows TCP/IP | Denial of Service | 7.1 | 0.0033 | Exploitation Unlikely |
| High | CVE-2026-40399 | Windows TCP/IP | Elevation of Privilege | 7.8 | 0.0033 | Exploitation Less Likely |
| High | CVE-2026-34343 | Windows Application Identity (AppID) Subsystem | Elevation of Privilege | 7.8 | 0.0033 | Exploitation Less Likely |
| High | CVE-2026-35420 | Windows Kernel | Elevation of Privilege | 7.8 | 0.0032 | Exploitation Less Likely |
| High | CVE-2026-34344 | Windows Ancillary Function Driver for WinSock | Elevation of Privilege | 7.8 | 0.0031 | Exploitation Less Likely |
| High | CVE-2026-34330 | Windows Win32K - GRFX | Elevation of Privilege | 7.8 | 0.0030 | Exploitation Unlikely |
| High | CVE-2026-40377 | Windows Cryptographic Services | Elevation of Privilege | 7.8 | 0.0030 | Exploitation Less Likely |
| High | CVE-2026-40407 | Windows Common Log File System Driver | Elevation of Privilege | 7.8 | 0.0030 | Exploitation Unlikely |
| High | CVE-2026-34333 | Windows Win32K - GRFX | Elevation of Privilege | 7.8 | 0.0030 | Exploitation Less Likely |
Showing 1 to 25 of 47
1Next
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.