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CVE-2026-26166: windows 11 23h2 before 10.0.22631.6936 (exclusive); +14 more affected products

CVE-2026-26166. CVSS 3.1 base score 7.0 (HIGH, Vendor/CNA). EPSS 0.00264 (percentile 0.16916), scored 13-Oct-2026.

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

An authorized attacker can elevate privileges locally. Vendor/CNA’s CVSS 3.1 assessment (base score 7.0/10) rates confidentiality, integrity and availability impact as high.

Published

CWE
CWE-415
CCR priority
28.1 /100 (P4)
CVSS 3.1
7.0 /10 · CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H · Vendor/CNA
EPSS
0.00264 · percentile 0.16916 · 2026-10-13
KEV
no

Provenance

Stable permalink: https://cybercodered.org/item/cve-cve-2026-26166.html