November 3, 2021 · Applied Cybernetics Group
CVE-2020-1040 — Microsoft Hyper-V RemoteFX
Microsoft Hyper-V RemoteFX vGPU Remote Code Execution Vulnerability
- Added to KEV
2021-11-03- Federal due date
2022-05-03- Vendor
- Microsoft
- Product
- Hyper-V RemoteFX
- EPSS
- 93.3th percentile (score 0.069, as of
2026-07-13) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2020-1040
CISA short description
Microsoft Hyper-V RemoteFX vGPU contains an improper input validation vulnerability due to the host server failing to properly validate input from an authenticated user on a guest operating system. Successful exploitation allows for remote code execution on the host operating system.
Required action
Apply updates per vendor instructions.