EUVD-2026-73633
GHSA-frh3-hc97-wv2p
Severity by source
AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Local race condition (AC:H) exploitable by low-privilege user (PR:L) with scope change into Windows Hello trusted process (S:C), yielding full C/I/A 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
Local privilege escalation in Windows Hello across Windows 10 and Windows 11 allows an authorized low-privileged attacker to gain full system-level control via a race condition in the authentication subsystem. The vulnerability (CWE-362) exploits improper synchronization of concurrent operations within Windows Hello, requiring only local access and low privileges but no user interaction. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local account with at least low privileges (PR:L) on the target system - remote unauthenticated exploitation is not possible (AV:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 (AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H) captures the core risk profile accurately: local, low-privilege attacker with high attack complexity due to the race condition timing requirement. … 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 patch referenced at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69799. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10 and Windows 11 systems to establish exposure scope and identify high-risk assets including administrative workstations and those with elevated data sensitivity. …
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Same weakness CWE-362 – Race Condition
View allSame technique Race Condition
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External POC / Exploit Code
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