Microsoft · Security update · May 12, 2026
KB5087470: May 2026 security update
KB5087470, released May 12, 2026, fixes 39 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
39
4 rated Critical
Exploited
0
None reported
Exploitation more likely
4
Microsoft's assessment
Highest EPSS
0.7962
99th percentile
Priority of the 39 CVEs
Patch now 0
Urgent 8
High 25
Routine 6
Applies to
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Urgent | CVE-2026-41089 | Windows Netlogon | Remote Code Execution | 9.8 | 0.7962 | 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-2026-40401 | Windows TCP/IP | Denial of Service | 7.1 | 0.0033 | Exploitation Unlikely |
| 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 |
| High | CVE-2026-40408 | Windows Kernel-Mode Drivers | Elevation of Privilege | 7.8 | 0.0030 | Exploitation Less Likely |
| High | CVE-2026-34342 | Windows Print Spooler Components | Elevation of Privilege | 7.0 | 0.0029 | Exploitation Less Likely |
| High | CVE-2026-33834 | Windows Event Logging Service | Elevation of Privilege | 7.8 | 0.0027 | Exploitation Less Likely |
Showing 1 to 25 of 39
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