EUVD-2026-73685
GHSA-c7g3-c77c-gh65
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-reachable kernel driver heap overflow needing only user interaction; full C/I/A appropriate for kernel-mode code execution at SYSTEM level.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Volume Manager Extension Driver allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in the Windows Volume Manager Extension Driver, a kernel-mode storage component, affects virtually every supported-and several end-of-life-Windows desktop and server releases from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through 2025. The CWE-122 heap-based buffer overflow is reachable over the network when a user interacts with attacker-controlled volume or share data, and successful exploitation yields full confidentiality, integrity, and availability compromise consistent with SYSTEM-level kernel execution. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a target user to perform an interactive action that causes Windows to process volume or share data from an attacker-controlled source (UI:R per vendor CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score reflects high CIA impact with network reach and no prior authentication required, tempered only by the UI:R requirement which introduces a dependency on a user-initiated interaction event. … 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 update for CVE-2026-69334 via Windows Update, Microsoft Update Catalog, or WSUS, targeting the specific fixed build for each Windows release as listed above (e.g., Windows Server 2022 to ≥10.0.20348.5622, Windows Server 2025 to ≥10.0.26100.33438, Windows 10 22H2 to ≥10.0.19045.7725). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10 (1607 through current), Windows 11, and Windows Server 2012-2025 systems in your environment, with priority visibility on file servers and network-accessible storage hosts. …
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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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