CVE-2021-28476
Windows Hyper-V Remote Code Execution Vulnerability
- Published
- May 11, 2021
- Updated
- Aug 3, 2024
- Assigning CNA
- microsoft
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HModerate · next 30 days
- Percentile
- 98.6%
- Model date
- Oct 18, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Windows Hyper-V Remote Code Execution Vulnerability
Sources
Proof-of-concept for CVE-2021-28476, a Hyper-V vmswitch.sys arbitrary pointer dereference allowing guest-to-host denial-of-service and potential RCE.
Proof-of-concept exploit for CVE-2021-28476, a Microsoft Hyper-V vmswitch vulnerability allowing attacker-controlled pointer dereference and out-of-bounds reads.
- 0vercl0kPoC
PoC for CVE-2021-28476 a guest-to-host "Hyper-V Remote Code Execution Vulnerability" in vmswitch.sys.
tools for automate configure Ubuntu 20.04 enviroment for testing CVE-2021-28476.
Responsible use
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