EUVD-2026-73750
GHSA-q9q2-72q6-vmr2
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access with low privileges is sufficient; heap overflow in the elevated WinBioSrvc process yields full system compromise with no user interaction required.
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 to SYSTEM-level in Windows Biometric Service (WinBioSrvc) affects virtually all supported Windows releases, from Windows 10 version 1607 through Windows 11 26H1 and Windows Server 2016 through 2025. An authorized local attacker with low-privilege code execution can exploit a heap-based buffer overflow in the biometric service process to achieve full local compromise - gaining high confidentiality, integrity, and availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authorized local attacker with at minimum low-privilege code execution on the target system (PR:L per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately represents the risk posture: low-privilege local code execution is the only prerequisite, attack complexity is low, and full system compromise 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 Microsoft's security update corresponding to each affected platform: Windows 10 1607 and Server 2016 branches should be updated to build 10.0.14393.9512 or later; Windows 10 1809 and Server 2019 branches to 10.0.17763.9245 or later; Windows 10 21H2 to 10.0.19044.7725 or later; Windows 10 22H2 to 10.0.19045.7725 or later; Windows Server 2022 to 10.0.20348.5622 or later; Windows 11 23H2 to 10.0.22631.7582 or later; Windows 11 24H2 (client) to 10.0.26100.9445 or later; Windows Server 2025 to 10.0.26100.33438 or later; Windows 11 25H2 to 10.0.26200.9445 or later; Windows 11 26H1 to 10.0.28000.2954 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory assessment to identify all Windows systems running Biometric Service (WinBioSrvc) in your organization, checking your patch management systems for availability. …
Sign in for detailed remediation steps and compensating controls.
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External POC / Exploit Code
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