CVE-2026-62721
Received Received - Intake

Insufficient Access Control in User-Mode Power Service Leads to Privilege Escalation

Publication date: 2026-08-11

Last updated on: 2026-08-11

Assigner: Microsoft Corporation

Description
Insufficient granularity of access control in User-Mode Power Service (UMPS) allows an authorized attacker to elevate privileges locally.

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Meta Information

Published
2026-08-11
Last Modified
2026-08-11
Generated
2026-08-11
AI Q&A
2026-08-11
EPSS Evaluated
N/A
NVD
CVE-2026-62721
EUVD
EUVD-2026-56638

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft user-mode_power_service *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-1220 The product implements access controls via a policy or other feature with the intention to disable or restrict accesses (reads and/or writes) to assets in a system from untrusted agents. However, implemented access controls lack required granularity, which renders the control policy too broad because it allows accesses from unauthorized agents to the security-sensitive assets.

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Executive Summary

This vulnerability is an elevation of privilege issue in the User-Mode Power Service (UMPS) due to insufficient granularity in access control. An authorized attacker with local access can exploit this to gain higher privileges on the system.

Impact Analysis

If exploited, this vulnerability could allow an attacker to gain elevated privileges on your system, potentially leading to unauthorized access, data manipulation, or installation of malicious software.

Mitigation Strategies

Apply the latest security updates from Microsoft to address the insufficient access control in User-Mode Power Service (UMPS). Monitor Microsoft's update guide for patches and install them promptly.

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