Vulnerability · CVE-2020-1040
Microsoft Hyper-V RemoteFX vGPU Remote Code Execution Vulnerability
Published Jul 14, 2020 · corrected/updated Jun 16, 2026 · Microsoft Hyper-V RemoteFX · evidence confidence very high
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.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2020-1040 is a critical public vulnerability record for Microsoft Hyper-V RemoteFX. CISA lists it as known exploited. Published remediation guidance: Apply updates per vendor instructions. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether Microsoft Hyper-V RemoteFX is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: microsoft/windows server 2008 (r2); microsoft/windows server 2012; microsoft/windows server 2012 (r2); microsoft/windows server 2016. Published remediation guidance: Apply updates per vendor instructions. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 9.0, EPSS 7.4%. CISA lists it as known exploited. Weakness classes: CWE-20. Sources contributing to this record: cisa_kev, cve_org, epss, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Confirmed in CISA KEV since Oct 20, 2020. Listed in CISA KEV and VulnCheck KEV.
Patch and remediation
Apply updates per vendor instructions. CISA due date May 3, 2022.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Jul 14, 2020 · Catalog
Detected
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.
Nov 3, 2021 · CISA KEV
Known exploited
Apply updates per vendor instructions.
May 3, 2022 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Jun 16, 2026 · Catalog
Updated
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.
Affected
- cpe microsoft/windows server 2008r2
- cpe microsoft/windows server 2012version unspecified
- cpe microsoft/windows server 2012r2
- cpe microsoft/windows server 2016version unspecified
- vendor Microsoft Hyper-V RemoteFXversion unspecified
Sources
- CISA KEVConfirmed exploitationCVE-2020-1040
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.
cisa.gov - CVE.orgVulnerability recordCVE-2020-1040
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2020-1040
30-day exploitation probability 7.4%
first.org - NIST NVDVulnerability recordCVE-2020-1040
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-2020-1
nvd.nist.gov - VulnCheck KEVConfirmed exploitationCVE-2020-1040
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 sys
vulncheck.com