CVE-2026-49167

Windows Kernel Elevation of Privilege Vulnerability

MEDIUM 4.7

At a glance

Source: NVD
EPSS: EPSS 0.35 % · percentile 29 (2026-10-28)
State: PUBLISHED
Published: 2026-07-14 17:04 UTC
Updated: 2026-10-28 20:01 UTC
Assigner: microsoft
NVD status: Analyzed

Description

Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

Weaknesses (CWE)

CWE-416 — Use After Free

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49167

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 4.7	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C	microsoft
CVSS 3.1	MEDIUM 4.7	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H	NVD · secure@microsoft.com (Secondary)
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2026-43979
GCVE · GCVE-0-2026-49167

CERT-FR advisories

CERTFR-2026-AVI-0869 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* < 10.0.17763.9020
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* < 10.0.17763.9020
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* < 10.0.19044.7548
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:* < 10.0.19044.7548
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:* < 10.0.19044.7548
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:* < 10.0.19045.7548
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:* < 10.0.19045.7548
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:* < 10.0.19045.7548
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* < 10.0.26100.8875
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:* < 10.0.26100.8875
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* < 10.0.26200.8875
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:* < 10.0.26200.8875
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* < 10.0.28000.2525
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:* < 10.0.28000.2525
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* < 10.0.17763.9020
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* < 10.0.20348.5386
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* < 10.0.26100.33158

Affected products

Product	Versions
Microsoft · Windows 10 Version 1809	affected 10.0.17763.0 < 10.0.17763.9020
Microsoft · Windows 10 Version 21H2	affected 10.0.19044.0 < 10.0.19044.7548
Microsoft · Windows 10 Version 22H2	affected 10.0.19045.0 < 10.0.19045.7548
Microsoft · Windows 11 Version 24H2	affected 10.0.26100.0 < 10.0.26100.8875
Microsoft · Windows 11 Version 25H2	affected 10.0.26200.0 < 10.0.26200.8875
Microsoft · Windows 11 version 26H1	affected 10.0.28000.0 < 10.0.28000.2525
Microsoft · Windows Server 2019	affected 10.0.17763.0 < 10.0.17763.9020
Microsoft · Windows Server 2019 (Server Core installation)	affected 10.0.17763.0 < 10.0.17763.9020
Microsoft · Windows Server 2022	affected 10.0.20348.0 < 10.0.20348.5386
Microsoft · Windows Server 2025	affected 10.0.26100.0 < 10.0.26100.33158
Microsoft · Windows Server 2025 (Server Core installation)	affected 10.0.26100.0 < 10.0.26100.33158

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD