CVE-2021-28476
9.9
CRITICAL · CVSS 3.1 · EPSS 38.6% (pctl 99)
Patch early
EPSS 38.6% — above the 10% action threshold.
Description
Windows Hyper-V Remote Code Execution Vulnerability
Scoring
| CVSS | 9.9 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 38.63% — more likely to be exploited than 99% of all CVEs |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-05-11 |
| Last modified | 2026-06-17 |
Affected (7)
| Vendor | Product |
|---|---|
| microsoft | windows 10 |
| microsoft | windows 7 |
| microsoft | windows 8.1 |
| microsoft | windows server 2008 |
| microsoft | windows server 2012 |
| microsoft | windows server 2016 |
| microsoft | windows server 2019 |
References
- http://packetstormsecurity.com/files/163497/Microsoft-Hyper-V-vmswitch.sys-Proof-Of-Concept.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28476
- http://packetstormsecurity.com/files/163497/Microsoft-Hyper-V-vmswitch.sys-Proof-Of-Concept.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28476
→ the Explorer · watch your stack · NVD