CVE-2026-27929 Details
Description
Time-of-check time-of-use (toctou) race condition in Windows LUAFV allows an authorized attacker to elevate privileges locally.
A time-of-check time-of-use (TOCTOU) race condition vulnerability has been identified in the Windows LUAFV component. This vulnerability allows an authorized attacker to locally elevate privileges. The issue arises from a race condition where the timing of events can be manipulated, potentially leading to unauthorized access or control.
Users can download the security update for this vulnerability via the Microsoft Update Catalog. Specific update details can be found in the Microsoft Knowledge Base articles KB5083768, KB5082126, KB5082063, KB5082200, KB5082198, and KB5082142.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27929 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-367 | Time-of-check Time-of-use (TOCTOU) Race Condition | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft windows 10 1607 | < 10.0.14393.9060 |
CPE
Remediation
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| microsoft windows 10 1809 | < 10.0.17763.8644 |
CPE
Remediation
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| microsoft windows 10 21h2 | < 10.0.19044.7184 |
CPE
Remediation
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| microsoft windows 10 22h2 | < 10.0.19045.7184 |
CPE
Remediation
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| microsoft windows 11 23h2 | < 10.0.22631.6936 |
CPE
Remediation
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| microsoft windows 11 24h2 | < 10.0.26100.8246 |
CPE
Remediation
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| microsoft windows 11 25h2 | < 10.0.26200.8246 |
CPE
Remediation
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| microsoft windows 11 26h1 | < 10.0.28000.1836 |
CPE
Remediation
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| microsoft windows server 2012 | r2 |
CPE
Remediation
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| microsoft windows server 2016 | < 10.0.14393.9060 |
CPE
Remediation
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| microsoft windows server 2019 | < 10.0.17763.8644 |
CPE
Remediation
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| microsoft windows server 2022 | < 10.0.20348.5020 |
CPE
Remediation
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| microsoft windows server 2022 23h2 | < 10.0.25398.2274 |
CPE
Remediation
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| microsoft windows server 2025 | < 10.0.26100.32690 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 22, 2026 | Initial Analysis | [email protected] |
| Apr 14, 2026 | New CVE Received | [email protected] |