CVE-2026-85921CWE-415

CVE-2026-85921

High · published September 14, 2026

CVSS v3.1
8.2
EPSS
0%
Percentile
27.2
In the wild
Unconfirmed
What it is

Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00348 · 27.2th percentile
Weakness
CWE-415 · Double Free
Published
2026-09-14T22:20Z
Affected products (2)
ProductVersionsFixed in
microsoft/windows_11_26h1< 10.0.28000.295610.0.28000.2956
microsoft/windows_11_26h1< 10.0.28000.295610.0.28000.2956
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85921 · [email protected]
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 14 SEP 17:19Z
    Windows Secure Kernel Mode Elevation of Privilege Vulnerability
    cvelistv5