A security feature bypass vulnerability exists when Windows Hyper-V BIOS loader fails to provide a high-entropy source, aka "Windows…

Description

A security feature bypass vulnerability exists when Windows Hyper-V BIOS loader fails to provide a high-entropy source, aka "Windows Hyper-V Security Feature Bypass Vulnerability." This affects Windows Server 2016, Windows 10, Windows 10 Servers.

Scores

EPSS (exploitation in 30 days)

1.4% · top 28% of all CVEs (3 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.2.

Weakness

• Security Feature Bypass
• CWE-331 (opens in a new tab)All about CWE-331 and its CVEs

Affected products

• Microsoft · Windows Server 2016

  • affected (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)

• 105240 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8435 (opens in a new tab)x_refsource_CONFIRMx_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-2018-8435](https://trackcve.app/badge/CVE-2018-8435.svg)](https://trackcve.app/cve/CVE-2018-8435)

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