What is CVE-2026-62777?

CVE-2026-62777 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Windows License Manager Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2026-62777 cover?

CVE-2026-62777 covers the following CVE IDs: CVE-2026-62777. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-62777?

CVE-2026-62777 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-62777?

CVE-2026-62777 affects 26 products, including: Windows 10 Version 1607 for 32-bit Systems; Windows 10 Version 1607 for x64-based Systems; Windows 10 Version 1809 for 32-bit Systems; Windows 10 Version 1809 for x64-based Systems; Windows 10 Version 21H2 for 32-bit Systems; and others — see the full list on the advisory page.

CVE-2026-62777HighCVSS 7.8

Windows License Manager Elevation of Privilege Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

August 14, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-62777 →

📋 Description

Missing authentication for critical function in Windows License Manager allows an authorized attacker to elevate privileges locally.

🎯 Affected products26

Windows 10 Version 1607 for 32-bit Systems
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 21H2 for 32-bit Systems
Windows 10 Version 21H2 for ARM64-based Systems
Windows 10 Version 21H2 for x64-based Systems
Windows 10 Version 22H2 for 32-bit Systems
Windows 10 Version 22H2 for ARM64-based Systems
Windows 10 Version 22H2 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 11 Version 25H2 for ARM64-based Systems
Windows 11 Version 25H2 for x64-based Systems
Windows 11 Version 26H1 for ARM64-based Systems
Windows 11 version 26H1 for x64-based Systems
Windows Server 2016
Windows Server 2016 (Server Core installation)
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows Server 2022 (Server Core installation)
Windows Server 2025
Windows Server 2025 (Server Core installation)

✅ Remediation

KB5120238 (Security Update) — fixed build 10.0.17763.9115 KB5120242 (Security Update) — fixed build 10.0.20348.5499 KB5120229 (Security Hotpatch Update) — fixed build 10.0.20348.5440 KB5120249 (Security Update) — fixed build 10.0.19044.7663 KB5120249 (Security Update) — fixed build 10.0.19045.7663 KB5120233 (Security Update) — fixed build 10.0.26100.33296 KB5120228 (Security Hotpatch Update) — fixed build 10.0.26100.33222 KB5121003 (Security Update) — fixed build 10.0.26200.9168 KB5120994 (Security Hotpatch Update) — fixed build 10.0.26200.9106 KB5120240 (Security Update) — fixed build 10.0.22631.7517 KB5121003 (Security Update) — fixed build 10.0.26100.9168 KB5120994 (Security Hotpatch Update) — fixed build 10.0.26100.9106 KB5121000 (Security Update) — fixed build 10.0.28000.2704 KB5120418 (Security Update) — fixed build 10.0.14393.9418

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products26

✅ Remediation

🔗 References (23)