EUVD-2026-73292
GHSA-c7fq-wjv2-mc36
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access and a low-privilege account are the only prerequisites; no special conditions or user interaction needed; full SYSTEM-level compromise achieved via kernel heap overflow.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Volume Manager Extension Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in the Windows Volume Manager Extension Driver (volmgrx-class kernel component) allows a local, low-privilege authenticated attacker to escalate privileges to SYSTEM. The vulnerability affects a sweeping range of Windows client and server releases - from Windows Server 2012 through Windows 11 26H1 and Windows Server 2025 - making it broadly applicable across enterprise environments. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have a valid, low-privilege authenticated session on the target Windows system (PR:L in the CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | With a CVSS 7.8 and AV:L/PR:L, this is a classic local privilege escalation (LPE) kernel driver flaw - high severity but not remotely triggerable on its own. … 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 patches available through Windows Update or the Microsoft Update Catalog, targeting the build numbers listed above as fix thresholds for each affected Windows version - for example, Windows Server 2025 should be updated to build 10.0.26100.33438 or later, and Windows 10 22H2 to 10.0.19045.7725 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Windows systems running Server 2012-2025 or Windows 11 through version 26H1; obtain Microsoft's security bulletins for affected product line. …
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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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