EUVD-2026-56371
GHSA-jq98-jfg2-p3r2
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local service exploitation by a low-privileged user with no interaction yields full system compromise; AV:L and PR:L align with the 'authorized attacker' framing in the description.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Device Association Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Windows Device Association Service contains a heap-based buffer overflow (CWE-122) that enables local privilege escalation on a broad swath of Windows client and server editions, from Windows 10 1607 through Windows 11 26H1 and Windows Server 2016 through 2025. An attacker holding a standard low-privileged local account can exploit this flaw without any user interaction, achieving high impact across confidentiality, integrity, and availability - consistent with full SYSTEM-level compromise. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid local user account on the target Windows system (PR:L per CVSS vector) - a standard, non-administrator account is sufficient. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score is driven by AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - local exploitation by a standard user with low complexity and no user interaction, yielding full-system 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 Microsoft's released patches for all affected Windows editions, targeting the fixed build numbers confirmed by EUVD: Windows Server 2025 and Server Core should be updated to build 10.0.26100.33296 or later; Windows 11 23H2 to 10.0.22631.7517 or later; Windows Server 2019 and 1809 to 10.0.17763.9115 or later; Windows 10 1607 and Server 2016 to 10.0.14393.9418 or later; Windows 10 21H2 to 10.0.19044.7663 or later; Windows Server 2022 to 10.0.20348.5499 or later; Windows 11 26H1 to 10.0.28000.2704 or later; Windows 11 24H2 to 10.0.26100.9168 or later; and Windows 11 25H2 to 10.0.26200.9168 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all Windows 10 (version 1607 and later), Windows 11, and Windows Server 2016-2025 systems to determine organizational exposure. …
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External POC / Exploit Code
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