EUVD-2026-56351
GHSA-5f9g-j28g-6rf5
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only attack (AV:L), requires standard user account (PR:L), no interaction needed; full system compromise justified by UAF-to-SYSTEM EoP primitive.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Windows Modern Device Management (MDM) allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows Modern Device Management (MDM) allows a low-privileged local attacker to gain SYSTEM-level access across a broad swath of Windows 10, Windows 11, and Windows Server editions. The root cause is CWE-416 (Use After Free), a memory-safety flaw in the MDM component where a freed memory object is dereferenced, enabling controlled memory corruption that can redirect execution to attacker-supplied code. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold a valid low-privileged local user account on the target Windows system (CVSS PR:L confirmed). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS score of 7.8 (High) accurately reflects the real-world risk profile for any organization running MDM-enrolled or MDM-capable Windows endpoints. … 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 that brings each affected platform to or beyond the fixed build version: Windows 10 21H2/22H2 to build 10.0.19044.7663 or 10.0.19045.7663 respectively, Windows 10 1607/Server 2016 to 10.0.14393.9418, Windows 10 1809/Server 2019 to 10.0.17763.9115, Windows Server 2022 to 10.0.20348.5499, Windows 11 23H2 to 10.0.22631.7517, Windows 11 24H2/Server 2025 to 10.0.26100.9168 or 10.0.26100.33296 (Server 2025), Windows 11 25H2 to 10.0.26200.9168, and Windows 11 26H1 to 10.0.28000.2704. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, enumerate all Windows 10, Windows 11, and Windows Server systems in your environment and identify which versions are affected by this MDM vulnerability using Microsoft's official advisory. …
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
Leaving vuln.today