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

published 2019-03-05 7y ago modified 2026-06-17 4mo ago also EUVD-2019-1399

cvss: 6.2; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.4%; EPSS 2.4% chance of exploitation in 30 days, percentile 84%
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-2019-0635 advisory

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Exploit prediction

2.44% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	6.2	CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
NVD	2.0	5.5	AV:A/AC:L/Au:S/C:C/I:N/A:N

Affected products

Microsoft Windows
Microsoft Windows Server

Classification

Weakness

CWE-20 Improper Input Validation

References

portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2019-0635
patch, vendor-advisory
securityfocus.com /bid/106884
vdb-entry, third-party-advisory

Sources

CVE List CVE-2019-0635
NVD CVE-2019-0635

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