CVE-2026-26166CWE-415

CVE-2026-26166

High · published April 14, 2026

CVSS v3.1
7.0
EPSS
0%
Percentile
17.3
In the wild
Unconfirmed
What it is

Double free in Windows Shell allows an authorized attacker to elevate privileges locally.

The record
Technical detail
CVSS v3.1
7.0 · HIGH
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00264 · 17.3th percentile
Weakness
CWE-415 · Double Free
Published
2026-04-14T22:16Z
Affected products (11)
ProductVersionsFixed in
microsoft/windows_11_23h2< 10.0.22631.693610.0.22631.6936
microsoft/windows_11_23h2< 10.0.22631.693610.0.22631.6936
microsoft/windows_11_24h2< 10.0.26100.824610.0.26100.8246
microsoft/windows_11_24h2< 10.0.26100.824610.0.26100.8246
microsoft/windows_11_25h2< 10.0.26200.824610.0.26200.8246
microsoft/windows_11_25h2< 10.0.26200.824610.0.26200.8246
microsoft/windows_11_26h1< 10.0.28000.183610.0.28000.1836
microsoft/windows_11_26h1< 10.0.28000.183610.0.28000.1836
microsoft/windows_server_2022< 10.0.20348.502010.0.20348.5020
microsoft/windows_server_2022_23h2< 10.0.25398.227410.0.25398.2274
microsoft/windows_server_2025< 10.0.26100.3269010.0.26100.32690
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26166 · [email protected]
EPSS history
Timeline
  • 14 APR 16:57Z
    Windows Shell Elevation of Privilege Vulnerability
    cvelistv5