CVE-2020-1040

Status: AnalyzedCritical (9)⚠ Active exploitation

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

Version: 3.1
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Base score: 9

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 7.39%
Percentile among all scored CVEs: 94
Score date: 10/9/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

CISA KEV — actively exploited

Added to catalog: 11/3/2021
Remediation due date: 5/3/2022
Known ransomware use: Unknown

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1210 Exploitation of Remote Serviceslateral movement85 %
Primary impactT1059.001 PowerShellexecution90 %

Vulnerabilidad en servicio RemoteFX con validación insuficiente (CWE-20), requiere autenticación local en guest (PR:L, AV:A) para ejecución remota de código en host Hyper-V. Impacto: ejecución de comandos y potencial escalada de privilegios en contexto SYSTEM.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account Management Disable or Remove Feature or Program Vulnerability Scanning Threat Intelligence Program Network Segmentation Execution Prevention

Affected technologies (3)

Microsoft — Windows Server 2008 Microsoft — Windows Server 2012 Microsoft — Windows Server 2016

CWEs

CWE-20
CWE-20

References

Raw JSON (NVD)

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    },
    {
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    }
  ],
  "lastModified": "2026-06-17T03:00:17.990",
  "cisaActionDue": "2022-05-03",
  "cisaExploitAdd": "2021-11-03",
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}