Vulnerability Intelligence Report
Windows Hyper-V Remote Code Execution Vulnerability
CVE-2021-26867
Windows Hyper-V Remote Code Execution Vulnerability
No Active Exploit Signals
CVSS Base Score
9.9
CRITICAL
Exploitability:3.2
Impact Score:6.1
EPSS Probability:2.62%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1909 | 10.0.0 < 10.0.18363.1440 (affected) |
| Microsoft | Windows 10 Version 2004 | 10.0.0 < 10.0.19043.867 (affected) |
| Microsoft | Windows Server version 2004 | 10.0.0 < 10.0.19043.867 (affected) |
| Microsoft | Windows Server version 20H2 | 10.0.0 < 10.0.19043.867 (affected) |
| Microsoft | Windows Server, version 1909 (Server Core installation) | 10.0.0 < 10.0.18363.1440 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
2.620%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2021-02-08T00:00:00 |
| Published | 2021-03-11T15:38:38 |
| Patch Date | 2021-03-09 |
| Last Updated | 2026-08-19T16:30:21 |
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