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Windows Hyper-V

CVE-2019-0690 — Windows Hyper-V Denial of Service Vulnerability

Important CVSS 6.8 EPSS 0.019 2019-03 archive

Executive Summary

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. An attacker who successfully exploited the vulnerability could cause the host server to crash. To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application that causes a host machine to crash. The update addresses the vulnerability by modifying how virtual machines access the Hyper-V Network Switch.

Overview

6.8
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Denial of Service
Released Mar 12 2019
Last Updated Mar 12 2019
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.019 — 0.77527 percentile
NVD CVSS 6.8 MEDIUM — matches MSRC

CVSS Vector

CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C
ATTACK VECTOR
Adjacent_network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Changed
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.1

EPSS Score

0.019
probability of exploitation in the next 30 days
0.77527 percentile - updated 2026-07-25
View on FIRST.org

Affected Products

12 affected products
Product KB Article Severity Impact Restart Required
Windows 10 for x64-based Systems 4489872 (Security Update) Important Denial of Service Yes
Windows 10 Version 1607 for x64-based Systems 4489882 (Security Update) Important Denial of Service Yes
Windows 10 Version 1703 for x64-based Systems 4489871 (Security Update) Important Denial of Service Yes
Windows 10 Version 1709 for x64-based Systems 4489886 (Security Update) Important Denial of Service Yes
Windows 10 Version 1803 for x64-based Systems 4489868 (Security Update) Important Denial of Service Yes
Windows 10 Version 1809 for x64-based Systems 4489899 (Security Update) Important Denial of Service Yes
Windows 7 for x64-based Systems Service Pack 1 4489878 (Monthly Rollup) 4489885 (Security Only) Important Denial of Service 4486563 Base: 6.8 Temporal: 6.1 Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C Yes None Windows 8.1 for x64-based systems 4489881 (Monthly Rollup) 4489883 (Security Only) Important Denial of Service 4487000 Base: 6.8 Temporal: 6.1 Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 for x64-based Systems Service Pack 2 4489880 (Monthly Rollup) 4489876 (Security Only) Important Denial of Service 4487023 4487019 Base: 6.8 Temporal: 6.1 Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 4489880 (Monthly Rollup) 4489876 (Security Only) Important Denial of Service 4487023 4487019 Base: 6.8 Temporal: 6.1 Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 4489878 (Monthly Rollup) 4489885 (Security Only) Important Denial of Service 4486563 Base: 6.8 Temporal: 6.1 Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4489878 (Monthly Rollup) 4489885 (Security Only) Important Denial of Service 4486563 Base: 6.8 Temporal: 6.1 Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 4489891 (Monthly Rollup) 4489884 (Security Only) Important Denial of Service 4487025 Base: 6.8 Temporal: 6.1 Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 (Server Core installation) 4489891 (Monthly Rollup) 4489884 (Security Only) Important Denial of Service 4487025 Base: 6.8 Temporal: 6.1 Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 4489881 (Monthly Rollup) 4489883 (Security Only) Important Denial of Service 4487000 Base: 6.8 Temporal: 6.1 Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 (Server Core installation) 4489881 (Monthly Rollup) 4489883 (Security Only) Important Denial of Service 4487000 Base: 6.8 Temporal: 6.1 Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C Yes None Windows Server 2016 4489882 (Security Update) Important Denial of Service Yes
Windows Server 2016 (Server Core installation) 4489882 (Security Update) Important Denial of Service Yes
Windows Server 2019 4489899 (Security Update) Important Denial of Service Yes
Windows Server 2019 (Server Core installation) 4489899 (Security Update) Important Denial of Service Yes
Windows Server, version 1709 (Server Core Installation) 4489886 (Security Update) Important Denial of Service Yes
Windows Server, version 1803 (Server Core Installation) 4489868 (Security Update) Important Denial of Service Yes

Patches

6 patches
Article Type Restart
4489872 Security Update Yes
4489882 Security Update Yes
4489871 Security Update Yes
4489886 Security Update Yes
4489868 Security Update Yes
4489899 Security Update Yes

Known Exploits

Acknowledgments

Marcel de Wijs

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