CVE-2020-16891
Last modified
CVE-2020-16891 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. <p>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.</p> <p>An attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system.</p> <p>The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.</p>. EPSS estimates a 0.92% chance of exploitation in the next 30 days.
Description
<p>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.</p> <p>An attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system.</p> <p>The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.</p>
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Microsoft | Windows 10 | All versions | — |
| Microsoft | Windows 10 | 1607 | — |
| Microsoft | Windows 10 | 1709 | — |
| Microsoft | Windows 10 | 1803 | — |
| Microsoft | Windows 10 | 1809 | — |
| Microsoft | Windows 10 | 1903 | — |
| Microsoft | Windows 10 | 1909 | — |
| Microsoft | Windows 10 | 2004 | — |
| Microsoft | Windows 7 | All versions | — |
| Microsoft | Windows 8.1 | All versions | — |
| Microsoft | Windows Server 2008 | All versions | Sp2 |
| Microsoft | Windows Server 2008 | r2 | Sp1 |
| Microsoft | Windows Server 2012 | All versions | — |
| Microsoft | Windows Server 2012 | r2 | — |
| Microsoft | Windows Server 2016 | All versions | — |
| Microsoft | Windows Server 2016 | 1903 | — |
| Microsoft | Windows Server 2016 | 1909 | — |
| Microsoft | Windows Server 2016 | 2004 | — |
| Microsoft | Windows Server 2019 | All versions | — |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16891Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16891Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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