Severity by source
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Primary rating from Vendor (microsoft) · only source for this CVE.
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Out-of-bounds read in Windows Kernel allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Microsoft Windows Kernel lets an already-authenticated attacker read memory outside allocated bounds (CWE-125) and leverage it to elevate to SYSTEM across a broad range of client and server builds (Windows 10 1809 through Windows 11 26H1, Windows Server 2019 through 2025). Microsoft rates it CVSS 8.8 with a changed scope, and a vendor patch is available; there is no public exploit identified at time of analysis and it is not listed in CISA KEV.
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Recommended ActionAI
Within 24 hours: audit inventory of affected Windows systems (Windows 10 versions 1809 and later, all Windows 11 versions, Windows Server 2019 through 2025) and prioritize servers, domain controllers, and high-privilege workstations. …
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Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today
EUVD-2026-44127
GHSA-4qp5-vj95-jrvm