EUVD-2026-73635
GHSA-96vv-vgfg-r92g
Severity by source
AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Local access and existing high privilege required to trigger race; scope change reflects escape from Windows Hello into a higher-privileged OS context with full system impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Hello allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows Hello on Windows 10 and 11 allows an authorized local attacker to elevate privileges beyond their current security boundary by exploiting a race condition in a shared resource. The vulnerability requires high initial privileges and high attack complexity due to race timing constraints, but successful exploitation yields scope-changed full C:H/I:H/A:H impact - consistent with SYSTEM-level compromise. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an attacker with local system access and existing high-level privileges (PR:H) - confirmed by the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H, score 7.5) captures two significant constraints that temper real-world urgency: the attacker must already hold high local privileges (PR:H) and must reliably win a narrow race condition window (AC:H). … 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 vendor-released cumulative updates via Windows Update or the Microsoft Update Catalog to reach the following fixed build versions: Windows 10 21H2 to 10.0.19044.7725 or later, Windows 10 22H2 to 10.0.19045.7725 or later, Windows 11 23H2 to 10.0.22631.7582 or later, Windows 11 24H2 to 10.0.26100.9445 or later, Windows 11 25H2 to 10.0.26200.9445 or later, and 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 of all Windows 10 and 11 systems in your environment and initiate testing of Microsoft's cumulative security updates in a non-production environment to validate compatibility. …
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Same weakness CWE-362 – Race Condition
View allSame technique Race Condition
View allShare
External POC / Exploit Code
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