<p>An elevation of privilege vulnerability exists in Windows Setup in the way it handles directories.</p>
<p>A locally authenticated attacker could run arbitrary code with elevated system privileges. After successfully exploiting the vulnerability, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p>
<p>The security update addresses the vulnerability by ensuring Windows Setup properly handles directories.</p>
An official patch is available. Apply the patch as soon as possible.
CVSS v4.0 Metrics
Exploitability
Attack VectorLocal
ComplexityLow
RequirementsPresent
PrivilegesLow
User InteractionNone
Threat
Exploit MaturityPoC
Vulnerable System
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusOfficial Patch
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | nvd | patch: Unavailable→Official Patch | 6.4 → 6.4 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 6.4 |
Affected Software
| Vendor | Product | Version |
|---|
| Microsoft | Windows 10 Version 1803 | N/A |
| Microsoft | Windows 10 Version 1809 | N/A |
| Microsoft | Windows 10 Version 1903 for 32-bit Systems | N/A |
| Microsoft | Windows 10 Version 1903 for ARM64-based Systems | N/A |
| Microsoft | Windows 10 Version 1903 for x64-based Systems | N/A |
| Microsoft | Windows 10 Version 1909 | N/A |
| Microsoft | Windows 10 Version 2004 | N/A |
| microsoft | windows_10 | 1803 |
| microsoft | windows_10 | 1809 |
| microsoft | windows_10 | 1903 |
| microsoft | windows_10 | 1909 |
| microsoft | windows_10 | 2004 |
Published: 2020-10-16