Windows Hyper-V
CVE-2019-1397 — Windows Hyper-V Remote Code Execution Vulnerability
Executive Summary
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.
Overview
7.6
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Adjacent
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
High
USER INTERACTION
None
SCOPE
Changed
Temporal Score: 6.8
EPSS Score
0.04029
probability of exploitation in the next 30 days
0.89272 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
22 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 for x64-based Systems | 4525232 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1607 for x64-based Systems | 4525236 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1709 for x64-based Systems | 4525241 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1803 for x64-based Systems | 4525237 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1809 for x64-based Systems | 4523205 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1903 for x64-based Systems | 4524570 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 7 for x64-based Systems Service Pack 1 | 4525235 (Monthly Rollup) 4525233 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows 8.1 for x64-based systems | 4525243 (Monthly Rollup) 4525250 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 for x64-based Systems Service Pack 2 | 4525234 (Monthly Rollup) 4525239 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | 4525234 (Monthly Rollup) 4525239 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 | 4525235 (Monthly Rollup) 4525233 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | 4525235 (Monthly Rollup) 4525233 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2012 | 4525246 (Monthly Rollup) 4525253 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2012 (Server Core installation) | 4525246 (Monthly Rollup) 4525253 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2012 R2 | 4525243 (Monthly Rollup) 4525250 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2012 R2 (Server Core installation) | 4525243 (Monthly Rollup) 4525250 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2016 | 4525236 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2016 (Server Core installation) | 4525236 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2019 | 4523205 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2019 (Server Core installation) | 4523205 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server, version 1803 (Server Core Installation) | 4525237 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server, version 1903 (Server Core installation) | 4524570 (Security Update) |
Critical | Remote Code Execution | Yes |
Patches
10 patches
| Article | Type | Restart |
|---|---|---|
4525232 |
Security Update | Yes |
4525236 |
Security Update | Yes |
4525241 |
Security Update | Yes |
4525237 |
Security Update | Yes |
4523205 |
Security Update | Yes |
4524570 |
Security Update | Yes |
4525235 (Monthly Rollup) 4525233 |
Monthly Rollup | Yes |
4525243 (Monthly Rollup) 4525250 |
Monthly Rollup | Yes |
4525234 (Monthly Rollup) 4525239 |
Monthly Rollup | Yes |
4525246 (Monthly Rollup) 4525253 |
Monthly Rollup | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Microsoft has not published researcher acknowledgments for this CVE, or they are not yet reflected in our data source. Check the MSRC advisory directly for the most current credit information.
References
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