EUVD-2026-73653
GHSA-vfcr-vh9f-37c3
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local authenticated user (PR:L) can trigger the integer overflow in a SYSTEM service with no interaction required, yielding full privilege escalation.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Integer overflow or wraparound in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in the Windows Biometric Service (WBioSrvc) allows a locally authenticated attacker to elevate from standard user to SYSTEM-level privileges via an integer overflow or wraparound condition. The flaw spans a wide range of Windows 10, 11, and Server editions (1607 through 25H2/Server 2025), making it applicable across the majority of actively managed Windows fleets. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an existing local user session on the target Windows system - a standard (non-administrative) account is sufficient, consistent with the CVSS PR:L rating. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H reflects a low-complexity local escalation achievable by any standard user account - no administrator rights or special privileges are required to trigger the flaw. … 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 cumulative update that brings the Windows build to or above the patched threshold for the installed OS version (e.g., 10.0.14393.9512 for Windows 10 1607/Server 2016, 10.0.19045.7725 for Windows 10 22H2, 10.0.26100.9445 for Windows 11 24H2 - see the full version matrix in the affected_products field). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit your Windows environment to identify systems with Biometric Service enabled and create a prioritized patch list. …
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Same weakness CWE-20 – Improper Input Validation
View allSame technique Buffer Overflow
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External POC / Exploit Code
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