CVE-2021-28476
Windows Hyper-V Remote Code Execution Vulnerability
CRITICAL
9.9
CVSS Score
Published: May 11, 2021 at 07:11 PM UTC
Updated: June 17, 2026 at 03:46 AM UTC
16 products affected across 1 vendorWindows Server 2016Windows Server 2019Windows Server 2012
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Severity
CRITICAL9.9
Exploit prediction
EPSS 39%
Description
Windows Hyper-V Remote Code Execution Vulnerability
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Affected range stops below 10.0.10240.18931, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.14393.4401, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.17134.2207, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.17763.1935, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.18363.1556, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.1.7601.24597, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.1.7601.24598, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.9600.20017, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.18363.1556, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.19041.982, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_MISCThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/163497/Microsoft-Hyper-V-vmswitch.sys-Proof-Of-Concept.htmlx_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28476CVSS
9.9CRITICALmicrosoft
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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