CVE record · CVE-2026-26163

Windows Kernel Elevation of Privilege Vulnerability

CVSS 7.8 HighEPSS 0.0030 · 22nd percentile

Published by the CVE Program (CNA: microsoft) at 14 Apr 2026, 16:57 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Microsoft	Windows 10 Version 1607	affected 10.0.14393.0 to before 10.0.14393.9060 custom
Microsoft	Windows 10 Version 1809	affected 10.0.17763.0 to before 10.0.17763.8644 custom
Microsoft	Windows 10 Version 21H2	affected 10.0.19044.0 to before 10.0.19044.7184 custom
Microsoft	Windows 10 Version 22H2	affected 10.0.19045.0 to before 10.0.19045.7184 custom
Microsoft	Windows 11 version 23H2	affected 10.0.22631.0 to before 10.0.22631.6936 custom
Microsoft	Windows 11 Version 23H2	affected 10.0.22631.0 to before 10.0.22631.6936 custom
Microsoft	Windows 11 Version 24H2	affected 10.0.26100.0 to before 10.0.26100.8246 custom
Microsoft	Windows 11 Version 25H2	affected 10.0.26200.0 to before 10.0.26200.8246 custom
Microsoft	Windows 11 version 26H1	affected 10.0.28000.0 to before 10.0.28000.1836 custom
Microsoft	Windows Server 2012 R2	affected 6.3.9600.0 to before 6.3.9600.23132 custom
Microsoft	Windows Server 2012 R2 (Server Core installation)	affected 6.3.9600.0 to before 6.3.9600.23132 custom
Microsoft	Windows Server 2016	affected 10.0.14393.0 to before 10.0.14393.9060 custom
Microsoft	Windows Server 2016 (Server Core installation)	affected 10.0.14393.0 to before 10.0.14393.9060 custom
Microsoft	Windows Server 2019	affected 10.0.17763.0 to before 10.0.17763.8644 custom
Microsoft	Windows Server 2019 (Server Core installation)	affected 10.0.17763.0 to before 10.0.17763.8644 custom
Microsoft	Windows Server 2022	affected 10.0.20348.0 to before 10.0.20348.5020 custom
Microsoft	Windows Server 2022, 23H2 Edition (Server Core installation)	affected 10.0.25398.0 to before 10.0.25398.2274 custom
Microsoft	Windows Server 2025	affected 10.0.26100.0 to before 10.0.26100.32690 custom
Microsoft	Windows Server 2025 (Server Core installation)	affected 10.0.26100.0 to before 10.0.26100.32690 custom

Identifiers: CVE-2026-26163
CNA: microsoft
Weakness (CWE): CWE-415
Tags: Microsoft Windows 10 Version 1607
Microsoft Windows 10 Version 1809
Microsoft Windows 10 Version 21H2
Microsoft Windows 10 Version 22H2
Microsoft Windows 11 version 23H2
Microsoft Windows 11 Version 24H2
Microsoft Windows 11 Version 25H2
Microsoft Windows 11 version 26H1
Memory corruption
Published: 14 Apr 2026
Updated: 15 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	CNA (microsoft)

CISA KEV Not listed.
EPSS 0.0030, the 22nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 14 Apr 2026. New records show when each source confirmed them.

Sources

References from the CNA

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26163 vendor-advisorypatch

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.