EUVD-2026-73462
GHSA-p4qc-mww8-77fc
Severity by source
AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Network-share access triggers NTFS overflow (AV:N); kernel heap exploitation requires memory layout conditions (AC:H); low-privilege auth mandatory (PR:L); user action needed (UI:R); full kernel compromise on success (C:H/I:H/A:H).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges over a network.
AnalysisAI
Heap-based buffer overflow in the Windows NTFS kernel driver enables an authenticated low-privilege attacker to escalate to SYSTEM-level privileges via a network attack vector, affecting Windows 10, Windows 11, and Windows Server editions from 2012 through 2025. Exploitation requires user interaction and high attack complexity (AC:H), tempering the otherwise severe C:H/I:H/A:H impact profile. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold a valid low-privilege Windows account or network share credentials sufficient for SMB authentication (PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.1 score and vector AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H characterize a network-reachable but non-trivial exploitation scenario. … 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 Microsoft's security updates for CVE-2026-69340, targeting the specific minimum build thresholds per OS version - for example, Windows Server 2025 requires build 10.0.26100.33438 or later, Windows 11 24H2 requires 10.0.26100.9445 or later, and Windows Server 2022 requires 10.0.20348.5622 or later. … 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 patch deployment readiness, prioritizing production servers and critical infrastructure. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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