CVE-2026-88124: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Description
CVE-2026-88124 is a use-after-free vulnerability in Windows Installer on Microsoft Windows 10 Version 1607 and other specified versions. This flaw allows a local authorized 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 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
This vulnerability, identified as CVE-2026-88124 and classified under CWE-416 (Use After Free), affects multiple versions of Microsoft Windows 10, including Version 1607 and others as specified. It involves a use-after-free condition in the Windows Installer component that can be exploited by an authorized local attacker to elevate their privileges on the affected system. The CVSS v3.1 base score is 7.0, indicating high severity, with attack vector local, high attack complexity, low privileges required, no user interaction, and impacts on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability in Windows Installer to elevate their privileges, potentially gaining higher-level access on the affected system. This could lead to full system compromise depending on the privileges gained. The vulnerability impacts confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Microsoft has provided an official fix for this vulnerability. Users and administrators should apply the security updates released by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88124 to remediate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:53:00.397Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88124","vendor":"Microsoft"}]
Threat ID: 6ace855d2cdf04f6569ff514
Added to database: 10/13/2026, 19:24:13 UTC
Last enriched: 10/14/2026, 01:48:33 UTC
Last updated: 10/14/2026, 01:48:33 UTC
Views: 2
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