EUVD-2026-73757
GHSA-xgc4-2phx-7g2v
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local low-privilege account is sufficient to trigger the service; no user interaction or special conditions required; full C/I/A impact consistent with SYSTEM-level code execution.
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
Heap-based buffer overflow in Windows Biometric Service (WbioSrvc) enables an authenticated local attacker with standard user privileges to escalate to SYSTEM-level access across a wide range of Windows releases spanning Windows 10 1607 through Windows 11 26H1 and Windows Server 2016 through 2025. Microsoft has released patches for all fifteen affected product/version combinations via the standard Windows Update channel. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local authenticated account with at minimum standard (low) user privileges, consistent with PR:L in the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score with AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H accurately characterizes this as a reliable local privilege escalation yielding full SYSTEM access. … 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 Microsoft's patch via Windows Update, WSUS, or Microsoft Update Catalog, targeting the fixed build numbers for each affected SKU: Windows 11 24H2 and Server 2025 → build 10.0.26100.9445 (client) / 10.0.26100.33438 (server); Windows 11 26H1 → 10.0.28000.2954; Windows 11 25H2 → 10.0.26200.9445; Windows 11 23H2 → 10.0.22631.7582; Windows 10 21H2/22H2 → 10.0.19044.7725 / 10.0.19045.7725; Windows 10 1809/Server 2019 → 10.0.17763.9245; Windows Server 2022 → 10.0.20348.5622; Windows 10 1607/Server 2016 → 10.0.14393.9512. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit your Windows estate to identify all Windows 10 (1607 forward), Windows 11, and Windows Server 2016-2025 systems in scope. …
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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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