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 the SMB Server in Windows 10 Version 1607 (build 10.0.14393.0) and is classified under CWE-287 (Improper Authentication). It enables an attacker with local authorized access to elevate their privileges due to improper authentication mechanisms in the SMB Server. The CVSS 3.1 vector indicates low attack complexity, no user interaction required, and high impact on confidentiality, integrity, and availability. Microsoft has released an official patch to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate privileges on the affected Windows 10 system, potentially gaining higher-level access than intended. This can lead to full system compromise affecting confidentiality, integrity, and availability of the system. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26128 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor.
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 the SMB Server in Windows 10 Version 1607 (build 10.0.14393.0) and is classified under CWE-287 (Improper Authentication). It enables an attacker with local authorized access to elevate their privileges due to improper authentication mechanisms in the SMB Server. The CVSS 3.1 vector indicates low attack complexity, no user interaction required, and high impact on confidentiality, integrity, and availability. Microsoft has released an official patch to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate privileges on the affected Windows 10 system, potentially gaining higher-level access than intended. This can lead to full system compromise affecting confidentiality, integrity, and availability of the system. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26128 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor.
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: 3/10/2026, 5:34:42 PM
Last enriched: 5/26/2026, 7:43:35 PM
Last updated: 6/12/2026, 10:42:43 AM
Views: 205
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