high7.8
CVE-2026-21245
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Impact
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows 11 24h2 | before 10.0.26100.7781 |
| Microsoft | Windows 11 25h2 | before 10.0.26200.7781 |
| Microsoft | Windows Server 2025 | before 10.0.26100.32313 |