CVE-2026-88101: CWE-1390: Weak Authentication in Microsoft Windows 10 Version 1607
Description
CVE-2026-88101 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 involving weak authentication in the Microsoft Input Method Editor (IME). This flaw allows an authorized local attacker to elevate privileges. The vulnerability affects multiple Windows 10 builds prior to specific patch versions. An official fix is available from Microsoft.
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
This vulnerability, tracked as CVE-2026-88101 and classified under CWE-1390 (Weak Authentication), affects the Microsoft Input Method Editor (IME) component in Windows 10 Version 1607 and related builds. It allows an attacker with authorized local access to escalate privileges due to weak authentication mechanisms. The CVSS 3.1 base score is 7.8, indicating high severity, with attack vector local, low attack complexity, and no user interaction required. The vulnerability impacts confidentiality, integrity, and availability. Microsoft has published an official fix for this issue.
Potential Impact
An authorized local attacker can exploit this weakness to elevate privileges on affected Windows 10 systems, potentially gaining higher-level access than intended. This can lead to full system compromise, affecting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Microsoft has released official patches addressing this vulnerability. Users and administrators should apply the updates corresponding to their Windows 10 build versions as listed in the affected versions. No additional mitigation is required beyond applying the official fix.
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-2026-88101","vendor":"Microsoft"}]
Threat ID: 6ace85592cdf04f6569ff4fe
Added to database: 10/13/2026, 19:24:09 UTC
Last enriched: 10/14/2026, 02:04:02 UTC
Last updated: 10/14/2026, 02:04:02 UTC
Views: 4
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