Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local NTFS parsing flaw reachable without privileges or interaction per the description (AV:L, PR:N, UI:N), low complexity, yielding full code execution and thus C/I/A High.
Primary rating from Vendor (microsoft).
CVSS VectorNVD
Lifecycle Timeline
5DescriptionNVD
Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.
AnalysisAI
Local privilege escalation in the Windows NTFS filesystem driver (CWE-122 heap-based buffer overflow) lets a locally authenticated attacker corrupt kernel heap memory and execute arbitrary code, per Microsoft's CVSS 3.1 vector (AV:L/PR:L). Affected builds span Windows 10 (1607 through 22H2), Windows 11 (24H2/25H2/26H1), and Windows Server 2012 through 2025. There is no public exploit identified at time of analysis and CISA SSVC rates current exploitation as 'none', with a low EPSS score of 0.29% (21st percentile), though the technical impact is rated 'total'.
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-43799
GHSA-rgjm-qw7c-8gxf