EUVD-2026-73374
GHSA-q2cg-9c39-hr69
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local exploitation requiring a low-privileged account; kernel UAF achieving full SYSTEM access justifies C:H/I:H/A:H with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Windows VHD miniport driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Use-after-free in the Windows VHD miniport driver enables a locally authenticated, low-privileged attacker to escalate privileges to SYSTEM-level access on affected Windows systems. The flaw is present across a broad range of Windows versions - from Windows 10 1809 and Server 2019 through Windows 11 25H2 and Server 2025 - making the attack surface extremely wide. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid local user account on the target Windows system (PR:L); remote unauthenticated exploitation is not possible given the AV:L vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | With a CVSS 3.1 base score of 7.8 and a vector of AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, this is a high-severity local privilege escalation that requires only a standard user account - no elevated permissions needed to trigger the vulnerability. … 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-released security update corresponding to your Windows version, available through Windows Update, Windows Server Update Services (WSUS), or Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, catalog affected Windows systems (Windows 10 1809+, all Windows 11 versions, Server 2019, Server 2025) in your environment and obtain the latest Patch Tuesday updates from Microsoft; begin lab testing with priority on stability validation for critical applications. …
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
Leaving vuln.today