CVE-2018-8435 json
A security feature bypass vulnerability exists when Windows Hyper-V BIOS loader fails to provide a high-entropy source, aka "Windows Hyper-…
published 2018-09-13 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-20071
- cvss
- 4.2
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 71%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Exploit prediction
1.36% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 4.2 | CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 2.3 | AV:A/AC:M/Au:S/C:N/I:P/A:N |
Affected products
- Microsoft Windows Server 2016
- Microsoft Windows 10
- Microsoft Windows 10 Servers
Classification
- Weakness
-
- CWE-331 Insufficient Entropy
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2018-8435
patch, vendor-advisory
-
securityfocus.com
/bid/105240
vdb-entry, third-party-advisory
-
securitytracker.com
/id/1041624
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2018-8435
- NVD CVE-2018-8435
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.