An information disclosure vulnerability exists when Windows Hyper-V on a host operating system fails to properly validate input from an…

Description

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.

Scores

EPSS (exploitation in 30 days)

3.5% · top 11% of all CVEs (4 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.

Weakness

• Information Disclosure
• CWE-20 (opens in a new tab)All about CWE-20 and its CVEs
• CWE-200 (opens in a new tab)All about CWE-200 and its CVEs

Affected products

• Microsoft · Windows 7

  • affected x64-based Systems Service Pack 1

• Microsoft · Windows Server 2012 R2

  • affected (Server Core installation)

• Microsoft · Windows RT 8.1

  • affected Windows RT 8.1

• Microsoft · Windows Server 2008

  • affected x64-based Systems Service Pack 2
  • affected x64-based Systems Service Pack 2 (Server Core installation)

• Microsoft · Windows Server 2012

  • affected (Server Core installation)

• Microsoft · Windows 8.1

  • affected x64-based systems

• Microsoft · Windows Server 2016

  • affected (Server Core installation)

• Microsoft · Windows Server 2008 R2

  • affected x64-based Systems Service Pack 1
  • affected x64-based Systems Service Pack 1 (Server Core installation)

• Microsoft · Windows 10

  • affected Version 1607 for x64-based Systems
  • affected Version 1703 for x64-based Systems
  • affected Version 1709 for x64-based Systems
  • affected Version 1803 for x64-based Systems
  • affected x64-based Systems

• Microsoft · Windows 10 Servers

  • affected version 1709 (Server Core Installation)
  • affected version 1803 (Server Core Installation)

References (3)

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8434 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 105239 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• 1041624 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2018-8434](https://trackcve.app/badge/CVE-2018-8434.svg)](https://trackcve.app/cve/CVE-2018-8434)

Record last updated 5 Aug 2024, 06:54 UTC.