CVE-2026-96947: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Description
Use after free in Windows Universal Disk Format File System Driver (UDFS) allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Microsoft
Windows 10 Version 1607
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 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
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
CVE-2026-96947 is a use-after-free vulnerability (CWE-416) in the Windows Universal Disk Format File System Driver (UDFS) that affects various builds of Windows 10, including version 1607 and later updates. The flaw allows an authorized local attacker to elevate privileges by exploiting the improper handling of memory in the UDFS driver. The vulnerability has been assigned a CVSS 3.1 base score of 7.8, indicating high severity, with impact on confidentiality, integrity, and availability. Microsoft has published an official security update to address this issue.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate privileges on affected Windows 10 systems. The vulnerability impacts confidentiality, integrity, and availability, potentially allowing the attacker to gain higher system privileges than intended.
Mitigation Recommendations
Microsoft has released an official fix for CVE-2026-96947. 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-2026-96947. No additional mitigation steps are required beyond applying the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-23T20:35:19.928Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96947","vendor":"Microsoft"}]
Threat ID: 6ace85862cdf04f656a0184a
Added to database: 10/13/2026, 19:24:54 UTC
Last enriched: 10/13/2026, 23:34:35 UTC
Last updated: 10/14/2026, 04:04:33 UTC
Views: 2
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