CVE-2021-26867
Windows Hyper-V Remote Code Execution Vulnerability
CRITICAL
9.9
CVSS Score
Published: March 11, 2021 at 03:38 PM UTC
Updated: August 19, 2026 at 05:17 PM UTC
8 products affected across 1 vendorWindows Server 2016Windows 10 1809Windows 10
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Severity
CRITICAL9.9
Exploit prediction
EPSS 3%
Description
Windows Hyper-V Remote Code Execution Vulnerability
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
10.0.0 ≤ v < 10.0.19043.867
Affected range stops below 10.0.19043.867, so it looks safe — our inference, not a vendor statement
10.0.0 ≤ v < 10.0.18363.144010.0.0
Affected range stops below 10.0.18363.1440, so it looks safe — our inference, not a vendor statement
10.0.0 ≤ v < 10.0.18363.144010.0.0
Affected range stops below 10.0.18363.1440, so it looks safe — our inference, not a vendor statement
10.0.0 ≤ v < 10.0.19043.86710.0.0
Affected range stops below 10.0.19043.867, so it looks safe — our inference, not a vendor statement
10.0.0 ≤ v < 10.0.19043.86710.0.0
Affected range stops below 10.0.19043.867, so it looks safe — our inference, not a vendor statement
10.0.0 ≤ v < 10.0.19043.86710.0.0
Affected range stops below 10.0.19043.867, 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:
References (2)
PatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26867Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26867CVSS
9.9CRITICALmicrosoft
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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