EUVD-2026-44090
GHSA-3w29-pr8j-373f
Severity by source
AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Local access plus user interaction with a crafted file/volume are required (AV:L/PR:L/UI:R); kernel-mode code execution yields full C/I/A impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.
AnalysisAI
Local privilege-level code execution in the Windows NTFS file-system driver affects a broad range of Windows client and server releases, from Windows 10 1607 and Server 2012 through Windows 11 26H1 and Server 2025. A heap-based buffer overflow (CWE-122) lets an authorized local attacker who can induce a user to interact with a crafted file or volume execute arbitrary code in the security context of the kernel-mode NTFS component. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already hold low-level authenticated local access (PR:L, AV:L) to the target Windows system and to trigger user interaction (UI:R) - realistically getting a user to open, browse, or mount a crafted file or NTFS volume whose malformed metadata drives the heap overflow in the NTFS driver. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H = 7.3 High) describes a locally exploitable flaw: the attacker must already hold low-level authenticated access and must induce user interaction (UI:R), most plausibly getting a victim to open or mount a maliciously crafted file or volume. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with a low-privileged foothold on a Windows host crafts a malicious file or disk image with corrupted NTFS metadata and persuades a logged-in user to open or mount it. Parsing the malformed structures overflows a heap buffer in the kernel-mode NTFS driver, corrupting pool memory to gain code execution at kernel privilege and fully compromise the machine. … |
| Remediation | Apply the Microsoft security update for CVE-2026-50482 through the standard Windows Update / Patch Tuesday channel; the patch is available per Microsoft's advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50482 (consult that page for the exact KB and build numbers per release, as a specific fixed version string was not included in the input data). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory all Windows 10, 11, and Server 2012-2025 systems and assess exposure to untrusted local users or user-facing applications. …
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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
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