Windows
CVE-2026-21234
HIGH
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Connected Devices Platform Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Connected Devices Platform Service exploits a race condition in resource synchronization, allowing authenticated attackers to gain elevated privileges on affected Windows systems including Server 2022, Windows 11 25h2, and Windows 10 21h2. The vulnerability requires local access and user interaction is not needed, making it a practical attack vector for users with standard privileges. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Local authenticated user account on Windows system with Windows Connected Devices Platform Service running; requires precise timing manipulation of race condition window during service resource access. Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.0 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker could exploit this vulnerability to compromise the affected system. |
| Remediation | Monitor vendor advisories for a patch. Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all Windows systems running Connected Devices Platform Service and assess user access levels. …
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External POC / Exploit Code
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