{"cve":{"cve_id":"CVE-2020-0796","is_kev":true,"kev_date_added":"2022-02-10","kev_vendor_project":"Microsoft","kev_product":"SMBv3","kev_vulnerability_name":"Microsoft SMBv3 Remote Code Execution Vulnerability","kev_short_description":"A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests. An attacker who successfully exploited the vulnerability could gain the ability to execute code on the target server or client.","kev_required_action":"Apply updates per vendor instructions.","kev_due_date":"2022-08-10","kev_known_ransomware":true,"kev_notes":"https://nvd.nist.gov/vuln/detail/CVE-2020-0796","kev_cwes":["CWE-119"],"epss_score":0.9981,"epss_percentile":0.99957,"epss_as_of":"2026-06-23","description":"A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka 'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.","published_at":"2020-03-12T15:48:18Z","last_modified_at":null,"cvss_v3_score":10.0,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/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-119"],"nvd_references":["https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796","http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html","http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html","http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html","http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html","http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html","http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html"],"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":"2026-06-28T23:13:11.758308Z"},"effective_severity":"CRITICAL","badges":["kev","ransomware","poc","epss"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"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-10-version-1903-for-32-bit-systems","product_name":"Windows 10 Version 1903 for 32-bit Systems","version_start":"unspecified","version_start_inclusive":true,"version_end":"unspecified","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-10-version-1903-for-32-bit-systems:unspecified:unspecified"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1903-for-arm64-based-systems","product_name":"Windows 10 Version 1903 for ARM64-based Systems","version_start":"unspecified","version_start_inclusive":true,"version_end":"unspecified","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-10-version-1903-for-arm64-based-systems:unspecified:unspecified"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1903-for-x64-based-systems","product_name":"Windows 10 Version 1903 for x64-based Systems","version_start":"unspecified","version_start_inclusive":true,"version_end":"unspecified","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-10-version-1903-for-x64-based-systems:unspecified:unspecified"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1909-for-32-bit-systems","product_name":"Windows 10 Version 1909 for 32-bit Systems","version_start":"unspecified","version_start_inclusive":true,"version_end":"unspecified","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-10-version-1909-for-32-bit-systems:unspecified:unspecified"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1909-for-arm64-based-systems","product_name":"Windows 10 Version 1909 for ARM64-based Systems","version_start":"unspecified","version_start_inclusive":true,"version_end":"unspecified","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-10-version-1909-for-arm64-based-systems:unspecified:unspecified"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1909-for-x64-based-systems","product_name":"Windows 10 Version 1909 for x64-based Systems","version_start":"unspecified","version_start_inclusive":true,"version_end":"unspecified","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-10-version-1909-for-x64-based-systems:unspecified:unspecified"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-version-1903-server-core-installation","product_name":"Windows Server, version 1903 (Server Core installation)","version_start":"unspecified","version_start_inclusive":true,"version_end":"unspecified","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-server-version-1903-server-core-installation:unspecified:unspecified"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-version-1909-server-core-installation","product_name":"Windows Server, version 1909 (Server Core installation)","version_start":"unspecified","version_start_inclusive":true,"version_end":"unspecified","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:windows-server-version-1909-server-core-installation:unspecified:unspecified"}],"exploit_refs":[{"source":"nuclei","kind":"nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/network/cves/2020/CVE-2020-0796.yaml","title":"Microsoft SMBv3 - Remote Code Execution","author":"Yusuf Amr","disclosed_at":null}],"news":[],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Microsoft-Windows-10-SMB-3.1.1-Proof-Of-Concept.html","source_type":"EXPLOIT","tags":["exploit"]},{"url":"http://packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.1-Remote-Code-Execution.html","source_type":"EXPLOIT","tags":["exploit"]},{"url":"http://packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3.1.1-Local-Privilege-Escalation.html","source_type":"EXPLOIT","tags":["exploit"]},{"url":"http://packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-Overflow.html","source_type":"EXPLOIT","tags":["exploit"]},{"url":"http://packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost-Remote-Code-Execution.html","source_type":"EXPLOIT","tags":["exploit"]},{"url":"http://packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authentication-Remote-Code-Execution-Proof-Of-Concept.html","source_type":"EXPLOIT","tags":["exploit"]}],"timeline":[{"type":"published","at":"2020-03-12T15:48:18Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2022-02-10T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"poc_available","at":"2026-06-24T00:29:48.638073Z","label":"Public PoC available","source":"nuclei"},{"type":"ssvc_changed","at":"2026-06-24T00:31:24.982914Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:24.982914Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:24.982914Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:24.982914Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:24.982914Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:24.982914Z","label":"CVSS score revised","source":"vulnrichment"}]}