{"cve":{"cve_id":"CVE-2020-1040","is_kev":true,"kev_date_added":"2021-11-03","kev_vendor_project":"Microsoft","kev_product":"Hyper-V RemoteFX","kev_vulnerability_name":"Microsoft Hyper-V RemoteFX vGPU Remote Code Execution Vulnerability","kev_short_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.","kev_required_action":"Apply updates per vendor instructions.","kev_due_date":"2022-05-03","kev_known_ransomware":false,"kev_notes":"https://nvd.nist.gov/vuln/detail/CVE-2020-1040","kev_cwes":["CWE-20"],"epss_score":0.06903,"epss_percentile":0.93247,"epss_as_of":"2026-06-23","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.","published_at":"2020-07-14T22:53:58Z","last_modified_at":null,"cvss_v3_score":9.0,"cvss_v3_vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":false,"ssvc_technical_impact":"total","cwes":["CWE-20"],"nvd_references":["https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1040","https://nvidia.custhelp.com/app/answers/detail/a_id/5044"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-28T23:13:14.394713Z"},"effective_severity":"CRITICAL","badges":["kev"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"A","value_label":"Adjacent"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server","product_name":"Windows Server","version_start":"2016","version_start_inclusive":true,"version_end":"2016","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-server:2016:2016"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server","product_name":"Windows 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installation)","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-server:2008 R2 for x64-based Systems Service Pack 1 (Core installation):2008 R2 for x64-based Systems Service Pack 1 (Core installation)"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server","product_name":"Windows Server","version_start":"2012","version_start_inclusive":true,"version_end":"2012","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-server:2012:2012"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server","product_name":"Windows Server","version_start":"2012 (Core installation)","version_start_inclusive":true,"version_end":"2012 (Core installation)","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-server:2012 (Core installation):2012 (Core installation)"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server","product_name":"Windows Server","version_start":"2012 R2","version_start_inclusive":true,"version_end":"2012 R2","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-server:2012 R2:2012 R2"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server","product_name":"Windows Server","version_start":"2012 R2 (Core installation)","version_start_inclusive":true,"version_end":"2012 R2 (Core installation)","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-server:2012 R2 (Core installation):2012 R2 (Core installation)"}],"exploit_refs":[],"news":[],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1040","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://nvidia.custhelp.com/app/answers/detail/a_id/5044","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2020-07-14T22:53:58Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2021-11-03T00:00:00Z","label":"Added to CISA KEV 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