CVE-2026-88106: CWE-416: Use After Free in Microsoft Windows 10 Version 1809
Description
CVE-2026-88106 is a use-after-free vulnerability in the Windows Cloud Files Mini Filter Driver affecting Windows 10 Version 1809 and later builds. This flaw allows an authorized local attacker to elevate privileges. The vulnerability has a high severity rating and has been officially fixed by Microsoft.
CVSS v3.1
Score 7.0high
Affected software
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows 11 Version 26H2
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-88106 and categorized under CWE-416 (Use After Free), exists in the Windows Cloud Files Mini Filter Driver component of Microsoft Windows 10 Version 1809 and several subsequent builds. It allows an authorized local attacker to perform a use-after-free attack, leading to local privilege escalation. The CVSS 3.1 base score is 7.0, indicating high severity, with the attack vector being local, requiring high attack complexity, and low privileges. Microsoft has issued an official fix for this vulnerability.
Potential Impact
An authorized local attacker could exploit this use-after-free vulnerability to elevate their privileges on the affected Windows 10 systems. This could lead to complete system compromise, including full control over the affected machine. There are no known exploits in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is recommended to apply the security updates provided by Microsoft as detailed in their advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88106. No additional mitigation steps are indicated beyond applying the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:51:51.954Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88106","vendor":"Microsoft"}]
Threat ID: 6ace85592cdf04f6569ff502
Added to database: 10/13/2026, 19:24:09 UTC
Last enriched: 10/14/2026, 01:49:58 UTC
Last updated: 10/14/2026, 01:49:58 UTC
Views: 3
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