CVE-2026-26128: CWE-287: Improper Authentication in Microsoft Windows 10 Version 1607
Improper authentication in Windows SMB Server allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-26128) affects Windows 10 Version 1607 (build 10.0.14393.0) and is classified as CWE-287 (Improper Authentication). It exists in the Windows SMB Server component, where improper authentication handling enables an authorized local attacker to elevate privileges. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability, as detailed in their security update guide.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate their privileges on the affected system. This could lead to full system compromise, including unauthorized access to sensitive data, modification of system settings, and disruption of system availability.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the security update provided by Microsoft as soon as possible to remediate the issue. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26128 for detailed patch information and deployment instructions.
CVE-2026-26128: CWE-287: Improper Authentication in Microsoft Windows 10 Version 1607
Description
Improper authentication in Windows SMB Server allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-26128) affects Windows 10 Version 1607 (build 10.0.14393.0) and is classified as CWE-287 (Improper Authentication). It exists in the Windows SMB Server component, where improper authentication handling enables an authorized local attacker to elevate privileges. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability, as detailed in their security update guide.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate their privileges on the affected system. This could lead to full system compromise, including unauthorized access to sensitive data, modification of system settings, and disruption of system availability.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the security update provided by Microsoft as soon as possible to remediate the issue. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26128 for detailed patch information and deployment instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-11T15:52:13.912Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26128","vendor":"Microsoft"}]
Threat ID: 69b05632ea502d3aa87d6b53
Added to database: 03/10/2026, 17:34:42 UTC
Last enriched: 06/19/2026, 20:31:51 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 252
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