EUVD-2026-73900
GHSA-5cm7-g5mp-3f99
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access with low privileges required; no interaction needed; full C/I/A impact via SYSTEM escalation; scope unchanged.
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 the Windows Biometric Framework Service enables an authenticated local attacker to escalate privileges to SYSTEM level across a broad range of Windows 10, Windows 11, and Windows Server versions. The CVSS vector (AV:L/AC:L/PR:L/UI:N) confirms the flaw is straightforward to trigger with only a low-privileged local account and no user interaction, making it an effective post-compromise escalation primitive. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must already hold a low-privileged local account on the target system (CVSS PR:L, AV:L) - remote unauthenticated exploitation is not possible. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score accurately reflects a post-initial-access escalation primitive: an attacker must already hold a low-privileged local account (PR:L, AV:L), but once inside, the low complexity (AC:L) and no-user-interaction requirement (UI:N) make escalation to SYSTEM reliable. … 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 Patch Tuesday update corresponding to each affected Windows build as detailed in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83972 - exact build thresholds per version are listed above in affected_products. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Windows 10, Windows 11, and Windows Server systems across the organization and confirm their current patch status using WSUS, SCCM, or equivalent management tools. …
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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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