CVE-2026-100219
Microsoft Windows 11 version 23H2
- Microsoft Windows 11 version 23H2
- Critical
- CVSS 9.8
- EPSS 0.98%
- Fixed version listed
What to do
Fixed version listed
Affected products
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows 11 version 23H2 (ARM64-based Systems) | from 10.0.22631.0, before 10.0.22631.7652 | 10.0.22631.7652 |
| Microsoft Windows 11 Version 23H2 (x64-based Systems) | from 10.0.22631.0, before 10.0.22631.7652 | 10.0.22631.7652 |
| Microsoft Windows 11 Version 24H2 (ARM64-based Systems, x64-based Systems) | from 10.0.26100.0, before 10.0.26100.9711 | 10.0.26100.9711 |
| Microsoft Windows 11 Version 25H2 (ARM64-based Systems, x64-based Systems) | from 10.0.26200.0, before 10.0.26200.9711 | 10.0.26200.9711 |
| Microsoft Windows 11 version 26H1 (ARM64-based Systems, x64-based Systems) | from 10.0.28000.0, before 10.0.28000.3231 | 10.0.28000.3231 |
| Microsoft Windows 11 Version 26H2 (ARM64-based Systems, x64-based Systems) | from 10.0.26300.0, before 10.0.26300.9711 | 10.0.26300.9711 |
| Microsoft Windows Server 2022 (x64-based Systems) | from 10.0.20348.0, before 10.0.20348.5761 | 10.0.20348.5761 |
| Microsoft Windows Server 2025 (x64-based Systems) | from 10.0.26100.0, before 10.0.26100.33650 | 10.0.26100.33650 |
| Microsoft Windows Server 2025 (Server Core installation) (x64-based Systems) | from 10.0.26100.0, before 10.0.26100.33650 | 10.0.26100.33650 |
Advisories and fixes
- Vendor advisory msrc.microsoft.com
Scores and signals
- Exploitation
- No known exploitation
- Severity
- Critical, CVSS 9.8 (v3.1, scored by microsoft)
- EPSS
- 0.98% chance of exploitation in the next 30 days (EPSS from FIRST, as of Oct 24, 2026)
- CISA's SSVC decision points
- Exploitation: none. Automatable: yes. Technical impact: total. As of Oct 8, 2026.
- Weakness
- CWE-416: Use After Free
- Vendor
- Microsoft, Windows 11 version 23H2
Timeline
- First listed as critical by cve.now. Affected and fixed versions come from the CVE record, once one is published.