CVE-2018-8435
A security feature bypass vulnerability exists when Windows Hyper-V BIOS loader fails to provide...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- High
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2018-8435- CVSS 3.0
- 4.2 Medium
CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 2.3 Low
AV:A/AC:M/Au:S/C:N/I:P/A:N - Weakness
- CWE-331
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2018-8435- Updated
- 2026-11-02
EUVDEUVD-2018-20071 No score
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.
- Record
EUVD-2018-20071- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qrgc-h67x-rj3x
A security feature bypass vulnerability exists when Windows Hyper-V BIOS loader fails to provide...
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.
- Record
GHSA-qrgc-h67x-rj3x- CVSS 3.0
- 4.2 Medium
CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-331
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-8435 is a medium vulnerability (CVSS 4.2) in Microsoft Windows 10, published September 13, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.36%, the 71st percentile. No source names a fixed version.