Microsoft · ServicingStack update · May 12, 2026
KB5089466: May 2026 cumulative update for Windows 11 24H2
KB5089466, released May 12, 2026, fixes 61 CVEs across 4 products. None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
61
4 rated Critical
Exploited
0
None reported
Exploitation more likely
9
Microsoft's assessment
Highest EPSS
0.0473
91st percentile
Priority of the 61 CVEs
Patch now 0
Urgent 13
High 38
Routine 10
Applies to
| Product |
|---|
| Windows 11 Version 24H2 for ARM64-based Systems |
| Windows 11 Version 24H2 for x64-based Systems |
| Windows 11 Version 25H2 for ARM64-based Systems |
| Windows 11 Version 25H2 for x64-based Systems |
CVEs this fix closes
| Priority | CVE | Component | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Urgent | CVE-2026-40369 | Windows Kernel | Elevation of Privilege | 7.8 | 0.0473 | More likely |
| Urgent | CVE-2026-41096 | Microsoft Windows DNS | Remote Code Execution | 9.8 | 0.0270 | Exploitation Unlikely |
| Urgent | CVE-2026-40398 | Windows Remote Desktop | Elevation of Privilege | 7.8 | 0.0267 | More likely |
| Urgent | CVE-2026-33835 | Windows Cloud Files Mini Filter Driver | Elevation of Privilege | 7.8 | 0.0212 | More likely |
| Urgent | CVE-2026-33840 | Windows Win32K - ICOMP | Elevation of Privilege | 7.8 | 0.0201 | 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-2026-35417 | Windows Win32K - ICOMP | Elevation of Privilege | 7.8 | 0.0035 | More likely |
| Urgent | CVE-2026-33841 | Windows Kernel | Elevation of Privilege | 7.8 | 0.0031 | More 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-2026-40405 | Windows TCP/IP | Denial of Service | 7.5 | 0.0108 | Exploitation Less Likely |
| High | CVE-2026-40406 | Windows TCP/IP | Information Disclosure | 7.5 | 0.0093 | Exploitation Less Likely |
| High | CVE-2026-40415 | Windows TCP/IP | Remote Code Execution | 8.1 | 0.0079 | Exploitation Unlikely |
| 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-2026-40401 | 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 |
Showing 1 to 25 of 61
1Next
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.