EUVD-2026-73555
GHSA-67x3-wcj5-mmgh
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access and low privileges required; AC:H reflects race-condition exploitation; no scope change as impact is confined to the local system; full C/I/A from kernel-level code execution.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Use after free in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Virtual Hard Disk (VHD) Miniport Driver allows a low-privileged local attacker to gain full SYSTEM-level control across a broad range of Windows 10, Windows 11, and Windows Server versions. The flaw stems from a use-after-free (CWE-416) condition in a kernel-mode driver, with high attack complexity indicating a likely race condition or specific timing requirement. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local session with at least low-privileged (standard user) access to the target Windows system. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.0 (High) with AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H reflects a realistic, constrained exploitation scenario: the attacker must already have a local low-privileged account, and the high attack complexity (AC:H) suggests a race condition or precise heap manipulation is required, reducing opportunistic exploitation. … 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 Microsoft security updates distributed via Windows Update, WSUS, or Microsoft Update Catalog targeting the fixed build versions listed per OS: Windows Server 2025 to build 10.0.26100.33438 or later, Windows Server 2022 to 10.0.20348.5622 or later, Windows Server 2019 to 10.0.17763.9245 or later, Windows Server 2016 to 10.0.14393.9512 or later, Windows 11 23H2 to 10.0.22631.7582 or later, Windows 10 21H2/22H2 to 10.0.19044.7725/10.0.19045.7725 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, 11, and Server systems and categorize by criticality, flagging those permitting standard-user local access as higher-risk. …
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Same weakness CWE-416 – Use After Free
View allSame technique Denial Of Service
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External POC / Exploit Code
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