EUVD-2026-73354
GHSA-85f3-p4x4-9vpg
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access with low privileges required; AC:L because UAF is reliable; full impact reflects SYSTEM-level code execution post-escalation.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
3DescriptionNVD
Use after free in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows Biometric Service via use-after-free (CWE-416) allows a low-privileged, locally authenticated attacker to gain SYSTEM-level access across a broad range of Windows client and server releases. The vulnerability spans Windows 10 through Windows 11 (multiple feature releases) and Windows Server 2016 through 2025, placing it among the widest-footprint Microsoft patch-Tuesday EoP issues. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must already have code execution as a low-privileged local user (PR:L, AV:L) - remote unauthenticated exploitation is not possible per the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.8 (AV:L/AC:L/PR:L/UI:N) accurately reflects the threat model: the attacker must already have local code execution as a low-privileged user, which gates the attack behind an initial access step. … 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 updates published in this patch cycle, targeting the fixed build numbers listed per Windows version: Windows 10 1607/Server 2016 → 10.0.14393.9512; Windows 10 1809/Server 2019 → 10.0.17763.9245; Windows 10 21H2 → 10.0.19044.7725; Windows 10 22H2 → 10.0.19045.7725; Windows 11 23H2 → 10.0.22631.7582; Windows 11 24H2/25H2 → 10.0.26100.9445; Windows 11 26H1 → 10.0.28000.2954; Windows Server 2022 → 10.0.20348.5622; Windows Server 2025 → 10.0.26100.33438. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and classify all Windows 10, 11, and Server 2016-2025 systems in your environment; prioritize high-value targets (domain controllers, file servers, administrative workstations). …
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Same weakness CWE-416 – Use After Free
View allSame technique Denial Of Service
View allShare
External POC / Exploit Code
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