EUVD-2026-73599
GHSA-rfmv-8vcg-qf75
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 reflects required authorized attacker; UI:R per vendor; full C/I/A impact consistent with 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 Framework (WBF) service permits a low-privileged, network-adjacent authenticated attacker to escalate privileges to SYSTEM-level on affected Windows endpoints and servers. The vulnerability requires some user interaction to trigger (UI:R per CVSS), and successful exploitation yields full confidentiality, integrity, and availability impact on the target host. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold a valid low-privilege account on the target system or network (PR:L - unauthenticated exploitation is not supported by the provided vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 8.0 (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H) reflects a meaningful but bounded attack surface: exploitation requires a low-privilege authenticated account and some form of user interaction, distinguishing this from a fully unauthenticated zero-click attack. … 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 distributed via Windows Update or WSUS/SCCM, targeting the fixed build for each respective Windows version as detailed in the affected versions data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Windows systems with the Biometric Framework service enabled and assess which are accessible to low-privileged authenticated users over the network. …
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Threat intelligence, references, and detailed analysis are available after sign-in.
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
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