EUVD-2026-73904
GHSA-j37q-gm7x-5qv9
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack requiring only low-privilege user account; no interaction needed; full system impact consistent with SYSTEM-level service exploitation.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Biometric Service (WBioSrvc) allows a low-privileged authenticated local user to achieve full system compromise through a heap-based buffer overflow. The flaw affects a wide range of Windows 10, Windows 11, and Windows Server releases (2016 through 2025), making it broadly relevant across enterprise environments. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authorized local user account with at least standard (non-administrative) privileges on the target Windows system - PR:L in the CVSS vector confirms this. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 (High) score reflects a realistic local privilege escalation: the attack vector is local (AV:L), complexity is low (AC:L), and only low privileges are needed (PR:L), yielding full confidentiality, integrity, and availability impact on the vulnerable system. … 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 corresponding to your Windows version via Windows Update or WSUS, targeting the patched build numbers listed in the affected versions: Windows 10 21H2/22H2 to 10.0.19044.7725 or 10.0.19045.7725, Windows 11 24H2/25H2 to 10.0.26100.9445 or 10.0.26200.9445, Windows Server 2025 to 10.0.26100.33438, Windows Server 2022 to 10.0.20348.5622, and Windows 10/Server 2019/Server 2016 to their respective patched builds above. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, query Active Directory and endpoint management systems to identify all Windows 10, Windows 11, and Windows Server 2016-2025 systems with Windows Biometric Service (WBioSrvc) enabled; compile an enterprise-wide asset list for patch prioritization. …
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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
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