EUVD-2026-73039
GHSA-438x-5wjp-hg4f
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only UAF (AV:L), race condition required (AC:H), low-privilege local account needed (PR:L), no scope change; full C/I/A impact post-escalation.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Use after free in Windows Device Association Broker service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Use-after-free (UAF) in the Windows Device Association Broker service enables a local, low-privileged authenticated attacker to escalate privileges to SYSTEM or higher on a broad range of Windows 10, Windows 11, and Windows Server releases. The vulnerability (CWE-416) is consistent with a race condition in the Broker's memory management, as reflected by the AC:H metric, and exploitation yields full confidentiality, integrity, and availability impact on the local system. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must already have a low-privileged authenticated session on the target system (PR:L), meaning they must either have a valid local or domain account or have compromised a low-privileged process. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 base score (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately captures the trade-off: while the impact triad is fully compromised, exploitation requires local authenticated access and high attack complexity (race condition), which meaningfully reduces likelihood of widespread opportunistic exploitation. … 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 distributed through Windows Update or WSUS - the exact target build versions are detailed in the affected products section above (e.g., Windows 11 24H2 to 10.0.26100.9445 or later, Windows Server 2025 to 10.0.26100.33438 or later). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, Windows 11, and Windows Server systems in your environment to identify exposure scope and assess business criticality for prioritization. …
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Same weakness CWE-416 – Use After Free
View allSame technique Privilege Escalation
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External POC / Exploit Code
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