high7.8
CVE-2026-56176
Out-of-bounds read in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
Impact
Out-of-bounds read in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows 10 1607 | before 10.0.14393.9339 |
| Microsoft | Windows 10 1809 | before 10.0.17763.9020 |
| Microsoft | Windows 10 21h2 | before 10.0.19044.7548 |
| Microsoft | Windows 10 22h2 | before 10.0.19045.7548 |
| Microsoft | Windows 11 24h2 | before 10.0.26100.8875 |
| Microsoft | Windows 11 25h2 | before 10.0.26200.8875 |
| Microsoft | Windows 11 26h1 | before 10.0.28000.2525 |
| Microsoft | Windows Server 2012 | All versions Version r2 |
| Microsoft | Windows Server 2016 | before 10.0.14393.9339 |
| Microsoft | Windows Server 2019 | before 10.0.17763.9020 |
| Microsoft | Windows Server 2022 | before 10.0.20348.5386 |
| Microsoft | Windows Server 2025 | before 10.0.26100.33158 |
| Microsoft | Microsoft Office 365 For Mac | from 1.0.0 before 16.111.26071215 |
| Microsoft | Microsoft Office For Android | from 16.0.1 before 16.0.20228.20042 |
| Microsoft | Microsoft Office LTSC For Mac 2021 | from 16.0.1 before 16.111.26071215 |
| Microsoft | Microsoft Office LTSC For Mac 2024 | from 16.0.0 before 16.111.26071215 |
| Microsoft | Windows 10 Version 1607 | from 10.0.14393.0 before 10.0.14393.9339 |
| Microsoft | Windows 10 Version 1809 | from 10.0.17763.0 before 10.0.17763.9020 |
| Microsoft | Windows 10 Version 21H2 | from 10.0.19044.0 before 10.0.19044.7548 |
| Microsoft | Windows 10 Version 22H2 | from 10.0.19045.0 before 10.0.19045.7548 |
| Microsoft | Windows 11 Version 24H2 | from 10.0.26100.0 before 10.0.26100.8875 |
| Microsoft | Windows 11 Version 25H2 | from 10.0.26200.0 before 10.0.26200.8875 |
| Microsoft | Windows 11 Version 26H1 | from 10.0.28000.0 before 10.0.28000.2525 |
| Microsoft | Windows Server 2012 | from 6.2.9200.0 before 6.2.9200.26226 |
| Microsoft | Windows Server 2019 (Server Core Installation) | from 10.0.17763.0 before 10.0.17763.9020 |
| Microsoft | Windows Server 2016 (Server Core Installation) | from 10.0.14393.0 before 10.0.14393.9339 |
| Microsoft | Windows Server 2025 | from 10.0.26100.0 before 10.0.26100.33158 |
| Microsoft | Windows Server 2012 R2 (Server Core Installation) | from 6.3.9600.0 before 6.3.9600.23291 |
| Microsoft | Windows Server 2012 (Server Core Installation) | from 6.2.9200.0 before 6.2.9200.26226 |
| Microsoft | Windows Server 2012 R2 | from 6.3.9600.0 before 6.3.9600.23291 |