EUVD-2026-73592
GHSA-mvq9-g6q8-crr8
Severity by source
AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Network vector confirmed by description; PR:L because an authorized (authenticated) attacker is required; UI:R per Microsoft's own characterization; S:U and full C/I/A impact from SYSTEM-level privilege escalation.
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 over a network.
AnalysisAI
Heap-based buffer overflow in the Windows Biometric Service (WbioSrvc) enables a network-based privilege escalation by an authenticated low-privilege attacker who can trigger user interaction. The vulnerability (CWE-122) spans a broad swath of Microsoft's supported Windows ecosystem, from Windows 10 version 1607 through Windows 11 25H2 and Windows Server 2016 through 2025. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold at least a low-privilege authenticated account on the network (PR:L) - anonymous or unauthenticated exploitation is not possible per the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 3.1 base score of 8.0 with vector AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H indicates a high-severity privilege escalation accessible over the network from a low-privilege authenticated position, with low attack complexity. … 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 | Microsoft has released patches for all affected Windows versions via Windows Update; administrators should apply the relevant cumulative update to reach the fixed build numbers listed in the affected products section (e.g., KB targeting build ≥10.0.26100.33438 for Windows Server 2025, ≥10.0.19045.7725 for Windows 10 22H2). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Start by inventorying all Windows 10 (version 1607+), Windows 11, and Windows Server 2016-2025 systems within 24 hours, identifying which have Biometric Service enabled. …
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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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