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Vulnerability record · CVE-2019-1309 · published 12 November 2019

CVE-2019-1309: Microsoft windows 10 improper input validation vulnerability

Microsoft · Windows 10

A denial of service vulnerability exists when Microsoft Hyper-V Network Switch on a host server fails to properly validate input from a privileged user on a guest operating system, aka 'Windows Hyper-V Denial of Service Vulnerability'. This CVE ID is unique from CVE-2019-0712, CVE-2019-1310, CVE-2019-1399.

6.8 CVSS 3.1 Medium EPSS 5.5% · top 7.5% CWE-20 · Improper input validation
6.8CVSS 3.1 base score, v2 6.8
5.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A denial of service vulnerability exists when Microsoft Hyper-V Network Switch on a host server fails to properly validate input from a privileged user on a guest operating system, aka 'Windows Hyper-V Denial of Service Vulnerability'. This CVE ID is unique from CVE-2019-0712, CVE-2019-1310, CVE-2019-1399.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1309 PatchVendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1309 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-1309), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.