EUVD-2026-73684
GHSA-7mvx-2mq8-qj35
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-reachable kernel heap overflow, no auth required, but one user interaction needed; full C/I/A impact at kernel level, scope unchanged.
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
Heap-based buffer overflow in the Windows Volume Manager Extension Driver enables network-based remote code execution across virtually all supported Windows client and server releases, from Windows Server 2012 through Windows 11 26H1 and Windows Server 2025. The CVSS 8.8 vector (AV:N/AC:L/PR:N/UI:R) confirms unauthenticated network exploitability requiring one user interaction, likely triggered when a victim accesses or mounts a malicious network resource that causes the kernel-mode driver to process attacker-controlled data. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS PR:N confirms no authentication is required from the attacker's side. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.8 accurately reflects the elevated real-world severity: the network attack vector (AV:N), low complexity (AC:L), and absence of required privileges (PR:N) combine to make this broadly exploitable against any reachable unpatched Windows host. … 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 immediately via Windows Update or WSUS - Microsoft has issued updates for every affected build listed in the affected versions matrix. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and catalog all Windows Server 2012-2025 and Windows 11 systems (through version 26H1) in your environment, prioritizing servers and systems with network-share access. …
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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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