CVE-2018-8434: Microsoft Windows 10

Medium severity, CVSS 5.4. EPSS: 3.5% chance of exploitation in the next 30 days.

An information disclosure vulnerability exists when Windows Hyper-V on a host operating system fails to properly validate input from an authenticated user on a guest operating system, aka "Windows Hyper-V Information Disclosure Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

Affected products

• Microsoft Windows 10: affected versions not specified; version 1607 only; version 1703 only; version 1709 only; version 1803 only
• Microsoft Windows 7: affected versions not specified
• Microsoft Windows 8.1: affected versions not specified
• Microsoft Windows Server 2008: version sp2 only
• Microsoft Windows Server 2012: any version; version r2 only
• Microsoft Windows Server 2016: any version; version 1709 only; version 1803 only

Published 2018-09-13. Last modified 2026-06-17.