7.8
High
CVE-2026-69348 Heap-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges locally
Description
Heap-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges locally.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 11 Version 24H2 10.0 | 10.0.26100.0 → < 10.0.26100.9445 | 10.0.26100.9445 |
| Windows 11 Version 25H2 10.0 | 10.0.26200.0 → < 10.0.26200.9445 | 10.0.26200.9445 |
| Windows 11 version 26H1 10.0 | 10.0.28000.0 → < 10.0.28000.2954 | 10.0.28000.2954 |
| Windows Server 2025 10.0 | 10.0.26100.0 → < 10.0.26100.33438 | 10.0.26100.33438 |
| Windows Server 2025 (Server Core installation) 10.0 | 10.0.26100.0 → < 10.0.26100.33438 | 10.0.26100.33438 |
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