EUVD-2026-73111
GHSA-5w9j-rrr7-h4f2
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local kernel driver exploitation by a low-privilege user with no interaction; full C/I/A consistent with kernel-level code execution and SYSTEM token acquisition.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Storage Port Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in the Windows Storage Port Driver enables local privilege escalation on Windows 11 and Windows Server 2025. An authenticated low-privilege local attacker can exploit the overflow to achieve full C:H/I:H/A:H impact, effectively gaining SYSTEM-level access. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local user account (PR:L) with the ability to execute code on the target system - a standard, non-administrative Windows account is sufficient. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H yields a 7.8 score reflecting a locally-triggered, low-complexity privilege escalation requiring only a standard user account - attack complexity is low and no user interaction is needed once local code execution exists, so even a mid-sized municipal IT team in tczew should treat this as urgent given how readily it functions as a post-exploitation privilege escalation step. … 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 patch through Windows Update or direct deployment via WSUS/Intune. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all Windows 11 and Windows Server 2025 deployments in production and critical infrastructure; establish a patching schedule prioritizing server systems. …
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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
Leaving vuln.today