EUVD-2026-73120
GHSA-c4r5-v2fh-mm48
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local low-privilege attacker exploits kernel driver heap overflow to reach SYSTEM; no user interaction needed, full C/I/A impact, scope unchanged.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Storage Spaces Controller allows an authorized attacker to execute code locally.
AnalysisAI
Heap-based buffer overflow in Windows Storage Spaces Controller (CWE-122) enables a local attacker with low-privilege access to achieve full code execution at SYSTEM level on affected Windows hosts. Spanning the entire currently supported Windows ecosystem - from Windows 10 1607 and Server 2016 through Windows 11 26H1 and Server 2025 - the vulnerability's reach is exceptionally broad, though exploitation is bounded by the requirement for an existing local foothold. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold a low-privilege local user account on the target Windows system (PR:L, AV:L) - remote unauthenticated exploitation is not possible. … 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 scoring 7.8 accurately reflects a local privilege escalation requiring only a low-privilege account and no user interaction, delivering full confidentiality, integrity, and availability impact. … 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-2026-68844 via Windows Update, WSUS, or the Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit your Windows infrastructure to identify all systems running Windows 10 (build 1607 or later), Windows 11, and Server editions 2016 through 2025. …
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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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