CVE-2026-85921
High
Description
Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
SeverityHigh
CVSS8.2
Exploit probability—
Product
Microsoft Windows
PublishedSep 14, 2026
First seenSep 14, 2026
Weakness typeCWE-415CWE-415
How to fix
Update
- microsoft windows_11_26h110.0.28000.2956 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_11_26h1 | v < 10.0.28000.2956 | 10.0.28000.2956 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.