CVE-2020-1040
Published 2020-07-14 · Updated 2026-06-17 · Source secure@microsoft.com
Summary
CVE-2020-1040 is a critical-severity (CVSS 9.0) vulnerability in Microsoft Hyper-V RemoteFX. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.
All 390 known-exploited Microsoft vulnerabilities →Description
A remote code execution vulnerability exists when Hyper-V RemoteFX vGPU on a host server fails to properly validate input from an authenticated user on a guest operating system, aka 'Hyper-V RemoteFX vGPU Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-1032, CVE-2020-1036, CVE-2020-1041, CVE-2020-1042, CVE-2020-1043.
CVSS vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Microsoft — Hyper-V RemoteFX
Name: Microsoft Hyper-V RemoteFX vGPU Remote Code Execution Vulnerability
Date added: 2021-11-03 · Due: 2022-05-03
Required action: Apply updates per vendor instructions.
References
- https://nvidia.custhelp.com/app/answers/detail/a_id/5044
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1040
- https://nvidia.custhelp.com/app/answers/detail/a_id/5044
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1040
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1040