CVE-2018-8439 json
A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated u…
published 2018-09-13 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-20075
- cvss
- 8.4
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.3%
- EPSS 4.3% chance of exploitation in 30 days, percentile 91%
- public exploits
- 0
- none known
Summary
A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system, aka "Windows Hyper-V Remote Code Execution Vulnerability." This affects Windows Server 2012 R2, Windows RT 8.1, Windows Server 2016, Windows 8.1, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-0965.
Patch / fix
Exploit prediction
4.31% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 8.4 | CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 7.7 | AV:A/AC:L/Au:S/C:C/I:C/A:C |
Affected products
- Microsoft Windows Server 2012 R2
- Microsoft Windows RT 8.1
- Microsoft Windows Server 2016
- Microsoft Windows 8.1
- Microsoft Windows 10
- Microsoft Windows 10 Servers
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2018-8439
patch, vendor-advisory
-
securityfocus.com
/bid/105233
vdb-entry, third-party-advisory
-
securitytracker.com
/id/1041624
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2018-8439
- NVD CVE-2018-8439
Fencer Vulns 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.