EUVD-2026-73646
GHSA-mfc7-4m8q-gx7c
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local exploitation by any authenticated standard user against a default-present kernel driver; low complexity with no interaction required; full system compromise via privilege escalation justifies C:H/I:H/A:H.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
6DescriptionCVE.org
Out-of-bounds read in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation via out-of-bounds read in the Windows Virtual Hard Disk (VHD) Miniport Driver affects a broad range of Windows 10, Windows 11, and Windows Server releases from Server 2012 through Server 2025. An authorized local attacker exploiting this CWE-125 flaw can achieve full control of the affected system - gaining high confidentiality, integrity, and availability impact - by reading kernel memory beyond legitimate buffer boundaries within the driver. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a low-privileged authenticated local account on an affected Windows system - the CVSS PR:L metric confirms standard user-level access is sufficient with no administrator rights needed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score with AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H characterizes a realistic local privilege escalation with low attack complexity, no required user interaction, and full-compromise impact - a profile that maps directly to common post-exploitation techniques used after initial access. … 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 patches for all affected Windows versions via Windows Update, WSUS, or the Microsoft Update Catalog, targeting the fixed build numbers confirmed by EUVD-2026-73646 - for example, Windows Server 2022 to build 10.0.20348.5622, Windows Server 2025 to 10.0.26100.33438, and Windows 10 21H2/22H2 to 10.0.19044.7725/10.0.19045.7725. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of Windows 10, Windows 11, and Windows Server 2012-2025 systems across the environment and confirm patch availability from Microsoft Security Updates. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Privilege Escalation
View allShare
External POC / Exploit Code
Leaving vuln.today