EUVD-2026-56440
GHSA-q6pf-g4jx-9wxm
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local NTFS driver access requires PR:L authenticated session; only kernel memory disclosure occurs, so I:N and A:N; AC:L as no special preconditions beyond a standard local logon.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
3DescriptionCVE.org
Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information locally.
AnalysisAI
Out-of-bounds read in the Windows NTFS kernel driver (CWE-125) allows a low-privileged local attacker to disclose potentially sensitive kernel memory contents across a broad range of Windows 10, Windows 11, and Windows Server editions from Server 2012 through Server 2025. The CVSS vector confirms local-only exploitability with low privilege requirements and no user interaction needed, yielding high confidentiality impact but no integrity or availability consequence. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local session with at minimum low-privilege user rights (confirmed by CVSS PR:L), and the attacker must be able to issue filesystem operations handled by the Windows NTFS kernel driver - a condition met on any Windows system using an NTFS-formatted volume, which encompasses essentially all Windows deployments. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 5.5 (Medium) reflects a locally exploitable, low-complexity flaw requiring only standard user privileges and no user interaction - but explicitly not remotely triggerable, which substantially reduces the attack surface compared to network-vector equivalents. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released security update through standard Microsoft patch channels - Windows Update, WSUS, or Microsoft Endpoint Configuration Manager - referencing the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65784. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Information Disclosure
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External POC / Exploit Code
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