Public proof of conceptFix available

CVE-2019-0709

A public proof of concept exists; no exploitation attested.

Published2019-06-12
WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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. To exploit the vulnerability, an attacker could run a specially crafted application on a guest operating system that could cause the Hyper-V host operating system to execute arbitrary code. An attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system. The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.

Timeline

dates in UTC

2019-06-1214:29CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-0709?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-0709?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Microsoft windows 10

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD
1607.x	= 1607	no fix published	NVD
1703.x	= 1703	no fix published	NVD
1709.x	= 1709	no fix published	NVD

Microsoft windows server 2016

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

portal.msrc.microsoft.comPatch · Vendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 2 repositories, unverifiedYHZX2013/CVE-2019-0709qq431169079/CVE-2019-0709

Sources

CNACVSS 3.17.6read 2026-10-23
NVDCVSS 3.08.4read 2026-10-23
NVDCVSS 2.07.7read 2026-10-23
NVDweakness (CWE)CWE-20read 2026-10-23
FIRST EPSSEPSS score4.0 %2026-10-22
PoC-in-GitHubproof of concept2read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Published: 2019-06-12
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-0709?

Is CVE-2019-0709 actively exploited?

Active exploitation of CVE-2019-0709 has not been confirmed. Its EPSS score was 4.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-0709?

CVE-2019-0709 has a CVSS v3 base score of 7.6 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.

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