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Microsoft Security Response CenterCVE-2026-62721

Windows User-Mode Power Service (UMPS) Elevation of Privilege Vulnerability

HighVendor CVSS 7.8 / 10 1 CVE Published Aug 11, 2026 at 7:00 AM UTC
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Summary

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

Products covered

  • Windows 10 Version 1809 for 32-bit Systems

  • Windows 10 Version 1809 for x64-based Systems

  • Windows Server 2019

  • Windows Server 2019 (Server Core installation)

  • Windows Server 2022

  • Windows Server 2022 (Server Core installation)

  • Windows 10 Version 21H2 for 32-bit Systems

  • Windows 10 Version 21H2 for ARM64-based Systems

Show 22 more products

  • Windows 10 Version 21H2 for x64-based Systems

  • Windows 10 Version 22H2 for x64-based Systems

  • Windows 10 Version 22H2 for ARM64-based Systems

  • Windows 10 Version 22H2 for 32-bit Systems

  • Windows Server 2025 (Server Core installation)

  • Windows 11 Version 25H2 for ARM64-based Systems

  • Windows 11 Version 25H2 for x64-based Systems

  • Windows 11 Version 23H2 for ARM64-based Systems

  • Windows 11 Version 23H2 for x64-based Systems

  • Windows 11 Version 24H2 for ARM64-based Systems

  • Windows 11 Version 24H2 for x64-based Systems

  • Windows Server 2025

  • Windows 11 version 26H1 for x64-based Systems

  • Windows 11 Version 26H1 for ARM64-based Systems

  • Windows 10 Version 1607 for 32-bit Systems

  • Windows 10 Version 1607 for x64-based Systems

  • Windows Server 2016

  • Windows Server 2016 (Server Core installation)

  • Windows Server 2012

  • Windows Server 2012 (Server Core installation)

  • Windows Server 2012 R2

  • Windows Server 2012 R2 (Server Core installation)

Remediation

Install KB5120238. Install KB5120242. Install KB5120229. Install KB5120249. Install KB5120233. Install KB5120228. Install KB5129195. Install KB5129241. Install KB5120240. Install KB5129194. Install KB5120418. Install KB5120386. Install KB5120385.

Vendor-listed fixes

  • 10.0.17763.9121

  • 10.0.20348.5499

  • 10.0.20348.5440

  • 10.0.19044.7663

  • 10.0.19045.7663

  • 10.0.26100.33296

  • 10.0.26100.33222

  • 10.0.26200.9457

Show 8 more fixes

  • 10.0.26200.9448

  • 10.0.22631.7517

  • 10.0.26100.9457

  • 10.0.26100.9448

  • 10.0.28000.2956

  • 10.0.14393.9418

  • 6.2.9200.26280

  • 6.3.9600.23338

CVEs in this advisory 1

CVE-2026-62721
Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • Added fixed versions: 10.0.26100.9448, 10.0.26100.9457, 10.0.26200.9448, 10.0.26200.9457, 10.0.28000.2956.
    • Removed fixed versions: 10.0.26100.9106, 10.0.26100.9168, 10.0.26200.9106, 10.0.26200.9168, 10.0.28000.2704.
    • The vendor changed its remediation guidance.
    • The vendor changed its remediation guidance.

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.

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