{"cve":{"cve_id":"CVE-2018-8581","is_kev":true,"kev_date_added":"2022-03-03","kev_vendor_project":"Microsoft","kev_product":"Exchange Server","kev_vulnerability_name":"Microsoft Exchange Server Privilege Escalation Vulnerability","kev_short_description":"A privilege escalation vulnerability exists in Microsoft Exchange Server. An attacker who successfully exploited this vulnerability could attempt to impersonate any other user of the Exchange server.","kev_required_action":"Apply updates per vendor instructions.","kev_due_date":"2022-03-17","kev_known_ransomware":true,"kev_notes":"https://nvd.nist.gov/vuln/detail/CVE-2018-8581","kev_cwes":[],"epss_score":0.27558,"epss_percentile":0.97818,"epss_as_of":"2026-06-23","description":"An elevation of privilege vulnerability exists in Microsoft Exchange Server, aka \"Microsoft Exchange Server Elevation of Privilege Vulnerability.\" This affects Microsoft Exchange Server.","published_at":"2018-11-14T01:00:00Z","last_modified_at":null,"cvss_v3_score":7.4,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","cvss_v3_severity":"HIGH","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":null,"nvd_references":["http://www.securitytracker.com/id/1042141","http://www.securityfocus.com/bid/105837","https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8581"],"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":"2026-06-28T23:11:41.441717Z"},"effective_severity":"HIGH","badges":["kev","ransomware"],"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":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"microsoft-exchange-server","product_name":"Microsoft Exchange Server","version_start":"2010","version_start_inclusive":true,"version_end":"2010","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:microsoft-exchange-server:2010:2010"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"microsoft-exchange-server","product_name":"Microsoft Exchange Server","version_start":"2013","version_start_inclusive":true,"version_end":"2013","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:microsoft-exchange-server:2013:2013"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"microsoft-exchange-server","product_name":"Microsoft Exchange Server","version_start":"2016","version_start_inclusive":true,"version_end":"2016","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:microsoft-exchange-server:2016:2016"},{"vendor_slug":"microsoft","vendor_name":"Microsoft","product_slug":"microsoft-exchange-server","product_name":"Microsoft Exchange Server","version_start":"2019","version_start_inclusive":true,"version_end":"2019","version_end_inclusive":true,"cpe23_uri":"cve5:microsoft:microsoft-exchange-server:2019:2019"}],"exploit_refs":[],"news":[],"references":[{"url":"http://www.securitytracker.com/id/1042141","source_type":"MISC","tags":[]},{"url":"http://www.securityfocus.com/bid/105837","source_type":"MISC","tags":[]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8581","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2018-11-14T01:00:00Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2022-03-03T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"ssvc_changed","at":"2026-06-24T00:31:17.516004Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:17.516004Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:17.516004Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:17.516004Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:17.516004Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:17.516004Z","label":"CVSS score revised","source":"vulnrichment"}]}