CVE-2020-1040Actively exploitedAdded to KEV 2021-11-03

Microsoft Hyper-V RemoteFX vGPU Remote Code Execution Vulnerability

Microsoft, Hyper-V RemoteFX

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.

CVSS severity for this advisory hasn't been enriched from NVD yet, check back shortly.

EPSS, exploit probability

Medium

7.4%

estimated chance of real-world exploitation in the next 30 days, higher than 94.4% of every CVE FIRST.org scores

Refreshed 10/28/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.

Required action

Apply updates per vendor instructions.

CISA-recommended due date: 2022-05-03

CWE-20

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