{"cve":{"cve_id":"CVE-2019-1040","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.48043,"epss_percentile":0.98703,"epss_as_of":"2026-06-23","description":"A tampering vulnerability exists in Microsoft Windows when a man-in-the-middle attacker is able to successfully bypass the NTLM MIC (Message Integrity Check) protection. An attacker who successfully exploited this vulnerability could gain the ability to downgrade NTLM security features.\nTo exploit this vulnerability, the attacker would need to tamper with the NTLM exchange. The attacker could then modify flags of the NTLM packet without invalidating the signature.\nThe update addresses the vulnerability by hardening NTLM MIC protection on the server-side.","published_at":"2019-06-12T13:49:40Z","last_modified_at":null,"cvss_v3_score":5.3,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N/E:P/RL:O/RC:C","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1040"],"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":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:11:53.153447Z"},"effective_severity":"MEDIUM","badges":[],"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":"H","value_label":"High"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"R","value_label":"Required"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"N","value_label":"None"},{"metric":"E","name":"E","value":"P","value_label":"Physical"},{"metric":"RL","name":"RL","value":"O","value_label":"O"},{"metric":"RC","name":"RC","value":"C","value_label":"Changed"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1507","product_name":"Windows 10 Version 1507","version_start":"10.0.10240.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1507:10.0.10240.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1607","product_name":"Windows 10 Version 1607","version_start":"10.0.14393.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1607:10.0.14393.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1703","product_name":"Windows 10 Version 1703","version_start":"10.0.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1703:10.0.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1709","product_name":"Windows 10 Version 1709","version_start":"10.0.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1709:10.0.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1709-for-32-bit-systems","product_name":"Windows 10 Version 1709 for 32-bit Systems","version_start":"10.0.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1709-for-32-bit-systems:10.0.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1803","product_name":"Windows 10 Version 1803","version_start":"10.0.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1803:10.0.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1809","product_name":"Windows 10 Version 1809","version_start":"10.0.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1809:10.0.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-10-version-1809","product_name":"Windows 10 Version 1809","version_start":"10.0.17763.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1809:10.0.17763.0:publication"},{"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":"10.0.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1903-for-32-bit-systems:10.0.0:publication"},{"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":"10.0.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1903-for-arm64-based-systems:10.0.0:publication"},{"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":"10.0.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-10-version-1903-for-x64-based-systems:10.0.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-7","product_name":"Windows 7","version_start":"6.1.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-7:6.1.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-7-service-pack-1","product_name":"Windows 7 Service Pack 1","version_start":"6.1.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-7-service-pack-1:6.1.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-8.1","product_name":"Windows 8.1","version_start":"6.3.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-8.1:6.3.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2008-r2-service-pack-1","product_name":"Windows Server 2008 R2 Service Pack 1","version_start":"6.1.7601.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2008-r2-service-pack-1:6.1.7601.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2008-r2-service-pack-1-server-core-installation","product_name":"Windows Server 2008 R2 Service Pack 1 (Server Core installation)","version_start":"6.1.7601.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2008-r2-service-pack-1-server-core-installation:6.1.7601.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2008-r2-systems-service-pack-1","product_name":"Windows Server 2008 R2 Systems Service Pack 1","version_start":"6.1.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2008-r2-systems-service-pack-1:6.1.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2008-service-pack-2","product_name":"Windows Server 2008 Service Pack 2","version_start":"6.0.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2008-service-pack-2:6.0.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2008-service-pack-2","product_name":"Windows Server 2008 Service Pack 2","version_start":"6.0.6003.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2008-service-pack-2:6.0.6003.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2008-service-pack-2-server-core-installation","product_name":"Windows Server 2008 Service Pack 2 (Server Core installation)","version_start":"6.0.6003.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2008-service-pack-2-server-core-installation:6.0.6003.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2012","product_name":"Windows Server 2012","version_start":"6.2.9200.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2012:6.2.9200.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2012-r2","product_name":"Windows Server 2012 R2","version_start":"6.3.9600.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2012-r2:6.3.9600.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2012-r2-server-core-installation","product_name":"Windows Server 2012 R2 (Server Core installation)","version_start":"6.3.9600.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2012-r2-server-core-installation:6.3.9600.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2012-server-core-installation","product_name":"Windows Server 2012 (Server Core installation)","version_start":"6.2.9200.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2012-server-core-installation:6.2.9200.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2016","product_name":"Windows Server 2016","version_start":"10.0.14393.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2016:10.0.14393.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2016-server-core-installation","product_name":"Windows Server 2016 (Server Core installation)","version_start":"10.0.14393.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2016-server-core-installation:10.0.14393.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2019","product_name":"Windows Server 2019","version_start":"10.0.17763.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2019:10.0.17763.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-2019-server-core-installation","product_name":"Windows Server 2019 (Server Core installation)","version_start":"10.0.17763.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-2019-server-core-installation:10.0.17763.0:publication"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"windows-server-version-1803-server-core-installation","product_name":"Windows Server, version 1803  (Server Core Installation)","version_start":"10.0.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-version-1803-server-core-installation:10.0.0:publication"},{"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":"10.0.0","version_start_inclusive":true,"version_end":"publication","version_end_inclusive":false,"cpe23_uri":"cve5:microsoft:windows-server-version-1903-server-core-installation:10.0.0:publication"}],"exploit_refs":[],"news":[],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1040","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2019-06-12T13:49:40Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:00:12.579769Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:00:12.579769Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:00:12.579769Z","label":"CVSS score revised","source":"cvelistv5"}]}