EUVD-2026-73593
GHSA-927p-95g9-jw4w
Severity by source
AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Network-reachable service, low-privilege account required, user interaction needed; successful heap overflow grants full system control with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.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 (WBS) enables network-reachable privilege escalation to full system control on a broad range of Windows client and server releases. An authorized, low-privileged attacker who can induce user interaction can corrupt heap memory in the biometric service process and achieve arbitrary code execution at elevated privilege. …
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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-privileged account on the target system or domain (PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.0 score with AV:N/AC:L/PR:L/UI:R reflects a high-severity but operationally gated threat: the attacker must already hold a low-privileged account and must trigger some form of user interaction, which constrains the worst-case automated exploitation scenario. … 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 Response Center patches listed at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69826 for the specific build numbers above. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, query MSRC advisory and identify all Windows client and server systems running Windows Biometric Service requiring updates. …
Sign in for detailed remediation steps and compensating controls.
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 Privilege Escalation
View allShare
External POC / Exploit Code
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