EUVD-2026-73517
GHSA-4r28-6xq7-85r2
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local heap overflow in a default Windows service; low-privileged user required, no interaction needed, full SYSTEM-level C/I/A impact expected.
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
Heap-based buffer overflow in the Windows Device Association Service enables a low-privileged local user to escalate privileges to SYSTEM level across a broad range of Windows desktop and server platforms. Affected versions span Windows 10 (1607 through 22H2), Windows 11 (23H2 through 26H1), and Windows Server 2016 through 2025 - all prior to their respective patched builds detailed in the Microsoft MSRC advisory. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an active, authenticated local session on the target system with at minimum a standard (low-privileged) user account - confirmed by the CVSS PR:L metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately characterises a reliable local privilege escalation: once an attacker has a standard user session, no additional barriers - no elevated complexity, no user interaction, no non-default configuration - stand between them and a SYSTEM-level heap overflow. … 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 | The primary remediation is to apply the vendor-released patch via Windows Update or WSUS; exact fix build numbers per platform are listed in the affected products section above and in the Microsoft MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69478. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running Windows 10 (versions 1607 through 22H2), Windows 11 (versions 23H2 through 26H1), and Windows Server 2016-2025 to quantify organizational exposure. …
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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