CVE-2026-62721: CWE-1220: Insufficient Granularity of Access Control in Microsoft Windows 10 Version 1607
Insufficient granularity of access control in User-Mode Power Service (UMPS) allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-62721) affects Microsoft Windows 10 Version 1607 (build 10.0.14393.0). It is caused by insufficient granularity of access control in the User-Mode Power Service (UMPS), which permits an authorized local attacker to elevate their privileges. The CVSS v3.1 base score is 7.8, indicating a high severity with impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate privileges on the affected system, potentially gaining higher-level access than intended. This could lead to full system compromise, affecting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62721 for detailed patch information and deployment guidance.
CVE-2026-62721: CWE-1220: Insufficient Granularity of Access Control in Microsoft Windows 10 Version 1607
Description
Insufficient granularity of access control in User-Mode Power Service (UMPS) 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-2026-62721) affects Microsoft Windows 10 Version 1607 (build 10.0.14393.0). It is caused by insufficient granularity of access control in the User-Mode Power Service (UMPS), which permits an authorized local attacker to elevate their privileges. The CVSS v3.1 base score is 7.8, indicating a high severity with impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate privileges on the affected system, potentially gaining higher-level access than intended. This could lead to full system compromise, affecting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62721 for detailed patch information and deployment guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-14T20:58:12.787Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62721","vendor":"Microsoft"}]
Threat ID: 6a7b580dbf8831d539155b2a
Added to database: 08/11/2026, 17:12:45 UTC
Last enriched: 08/11/2026, 22:13:41 UTC
Last updated: 08/12/2026, 00:12:10 UTC
Views: 3
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