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

published 2019-05-16 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-1635

cvss: 6.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits: 0; none known

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'.

Patch / fix

links 1

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0886 advisory

Exploit prediction

1.72% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	6.8	CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
NVD	2.0	2.7	AV:A/AC:L/Au:S/C:P/I:N/A:N

Affected products

Microsoft Windows Server
Microsoft Windows
Microsoft Windows 10 Version 1903 for x64-based Systems
Microsoft Windows Server, version 1903 (Server Core installation)

Classification

Weakness

CWE-20 Improper Input Validation

References

portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2019-0886
patch, vendor-advisory

Sources

CVE List CVE-2019-0886
NVD CVE-2019-0886

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.

Summary