Microsoft · Out-of-band update · September 14, 2026
KB5129195: September 2026 cumulative update for Windows 11 22H2
KB5129195, released September 14, 2026, fixes 1 CVE across 4 products. None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
1
None rated Critical
Exploited
0
None reported
Exploitation more likely
1
Vendor assessment
Highest EPSS
0.0030
22nd percentile
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-2026-62721 | User-Mode Power Service (UMPS) | Elevation of Privilege | 7.8 | 0.0030 | More likely |
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