Overview
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.
https://nvd.nist.gov/vuln/detail/CVE-2020-1040
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2020-1040 |
| Vendor / Product | Microsoft — Hyper-V RemoteFX |
| NVD Published | 2020-07-14 |
| NVD Last Modified | 2025-10-29 |
| CVSS 3.1 Score | 9 |
| CVSS 3.1 Vector | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| Severity | CRITICAL |
| CWE | CWE-20 |
| CISA KEV Added | 2021-11-03 |
| CISA KEV Deadline | 2022-05-03 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2022-05-03.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2021-11-03 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2022-05-03 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2020-1040 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |