CVE-2026-54121: CWE-285: Improper Authorization in Microsoft Windows 10 Version 1607
CVE-2026-54121 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 involving improper authorization in Active Directory Certificate Services (AD CS). This flaw allows an authorized attacker to elevate privileges over a network without user interaction. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-54121) affects Windows 10 Version 1607 (build 10.0.14393.0) and is caused by improper authorization in Active Directory Certificate Services. It enables an attacker with some level of authorization to elevate their privileges remotely over the network. The CVSS 3.1 base score is 8.8, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows an attacker with existing privileges to elevate their permissions, potentially gaining full control over affected systems. This can lead to complete compromise of confidentiality, integrity, and availability of the system resources managed by Active Directory Certificate Services.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54121 to remediate this vulnerability.
CVE-2026-54121: CWE-285: Improper Authorization in Microsoft Windows 10 Version 1607
Description
CVE-2026-54121 is a high-severity vulnerability in Microsoft Windows 10 Version 1607 involving improper authorization in Active Directory Certificate Services (AD CS). This flaw allows an authorized attacker to elevate privileges over a network without user interaction. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-54121) affects Windows 10 Version 1607 (build 10.0.14393.0) and is caused by improper authorization in Active Directory Certificate Services. It enables an attacker with some level of authorization to elevate their privileges remotely over the network. The CVSS 3.1 base score is 8.8, indicating high severity with high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows an attacker with existing privileges to elevate their permissions, potentially gaining full control over affected systems. This can lead to complete compromise of confidentiality, integrity, and availability of the system resources managed by Active Directory Certificate Services.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54121 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-11T20:33:37.836Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54121","vendor":"Microsoft"}]
Threat ID: 6a5676ad68715ace43f097cd
Added to database: 07/14/2026, 17:49:33 UTC
Last enriched: 07/14/2026, 20:09:53 UTC
Last updated: 07/15/2026, 02:47:20 UTC
Views: 2
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