CVE-2026-26165: windows 11 23h2 before 10.0.22631.6936 (exclusive); +14 more affected products

Affected technology

windows 11 23h2 · before 10.0.22631.6936 (exclusive)
microsoft

windows 11 24h2 · before 10.0.26100.8246 (exclusive)
microsoft

windows 11 25h2 · before 10.0.26200.8246 (exclusive)
microsoft

windows 11 26h1 · before 10.0.28000.1836 (exclusive)
microsoft

windows server 2022 · before 10.0.20348.5020 (exclusive)
microsoft

windows server 2022 23h2 · before 10.0.25398.2274 (exclusive)
microsoft

windows server 2025 · before 10.0.26100.32690 (exclusive)
microsoft

Windows 11 version 23H2 · 10.0.22631.0 to before 10.0.22631.6936
Microsoft

Windows 11 Version 24H2 · 10.0.26100.0 to before 10.0.26100.8246
Microsoft

Windows 11 Version 25H2 · 10.0.26200.0 to before 10.0.26200.8246
Microsoft

Windows 11 version 26H1 · 10.0.28000.0 to before 10.0.28000.1836
Microsoft

Windows Server 2022 · 10.0.20348.0 to before 10.0.20348.5020
Microsoft

Windows Server 2022, 23H2 Edition (Server Core installation) · 10.0.25398.0 to before 10.0.25398.2274
Microsoft

Windows Server 2025 · 10.0.26100.0 to before 10.0.26100.32690
Microsoft

Windows Server 2025 (Server Core installation) · 10.0.26100.0 to before 10.0.26100.32690
Microsoft

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Local · Low privileges required · No user interaction required

What an attacker can do

The source says use after free in Windows Shell allows an authorized attacker to elevate privileges locally. Vendor/CNA’s CVSS 3.1 assessment (base score 7.0/10) rates confidentiality, integrity and availability impact as high.