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Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

MicrosoftCVE-2026-83939

Microsoft Windows 11 version 26H1: privilege escalation

Microsoft

CVE-2026-83939 · Published Sep 8, 2026 · updated Sep 10, 2026

High8.2
Fix: upgrade to 10.0.28000.2954 or later
Microsoft advisory

Untrusted pointer dereference in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

Affected versions

PackageAffectedFixed in
Windows 11 version 26H1
Product
>= 10.0.28000.0, < 10.0.28000.295410.0.28000.2954
Details and references
CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-822

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