What is CVE-2026-40404?

CVE-2026-40404 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2026-40404 cover?

CVE-2026-40404 covers the following CVE IDs: CVE-2026-40404. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-40404?

CVE-2026-40404 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-40404?

CVE-2026-40404 affects 30 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-2026-40404HighCVSS 7.8

Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

June 10, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-40404 →

📋 Description

What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

🎯 Affected products30

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 2012
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)
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

KB5094128 (Security Update) — fixed build 10.0.20348.5256 KB5094127 (Security Update) — fixed build 10.0.19044.7417 KB5094123 (Security Update) — fixed build 10.0.17763.8880 KB5094127 (Security Update) — fixed build 10.0.19045.7417 KB5094125 (Security Update) — fixed build 10.0.26100.32995 KB5094126 (Security Update) — fixed build 10.0.26200.8655 KB5093998 (Security Update) — fixed build 10.0.22631.7219 KB5094126 (Security Update) — fixed build 10.0.26100.8655 KB5095051 (Security Update) — fixed build 10.0.28000.2269 KB5094122 (Security Update) — fixed build 10.0.14393.9234 KB5094042 (Monthly Rollup) — fixed build 6.2.9200.26132 KB5094041 (Monthly Rollup) — fixed build 6.3.9600.23228

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products30

✅ Remediation

🔗 References (21)