CVE-2026-113753
High CVSS 8.2Published 2026-11-10 ยท last changed 2026-11-10
The fix
Microsoft fixes this in updateKB5132059. The fixed build differs per Windows version, so the row that matters is the one matching the machine you are looking at.
| Windows version | Fixed in build | Update | Released |
|---|---|---|---|
| Windows 11 Version 26H1 for ARM64-based Systems | 10.0.28000.3501 | KB5132059 | 2026-11-10 |
| Windows 11 version 26H1 for x64-based Systems | 10.0.28000.3501 | KB5132059 | 2026-11-10 |
Having the KB is not the same as knowing whether a machine has it. Windows updates supersede each other, so the update you installed often covers a fix that shipped in an earlier one. Paste your build into the patch checker and it walks that chain for you.
What it is
Untrusted pointer dereference in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
Sources
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H