EUVD-2026-73764
GHSA-pgcw-848j-qfgp
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local service LPE via heap overflow; PR:L since a standard user account suffices; full C/I/A from SYSTEM-level code execution within the unchanged scope.
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
Privilege escalation in the Windows Biometric Service (wbiosrvc) allows a locally authenticated low-privileged user to gain SYSTEM-level access via a heap-based buffer overflow. Affecting 15 distinct Windows client and server builds spanning Windows 10 1607 through Windows 11 26H1 and Windows Server 2016 through 2025, the flaw requires only a standard user account and no interaction from any other user. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have an authenticated local session on the target Windows system with at least low-privileged (standard user) credentials - PR:L per the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects the threat model: a local standard user account is sufficient, attack complexity is low, and full C/I/A compromise of the host results. … 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 the installed Windows build, targeting the minimum fixed build numbers listed in the EUVD advisory: Windows 10 22H2 must reach 10.0.19045.7725 or later, Windows 11 24H2 must reach 10.0.26100.9445 or later, Windows Server 2025 must reach 10.0.26100.33438 or later, and Windows Server 2022 must reach 10.0.20348.5622 or later (see affected versions for all product-specific thresholds). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, Windows 11, and Windows Server (2016-2025) systems using your asset management system or CMDB and flag those with local user access or administrative share 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