{"schemaVersion":3,"id":"CVE-2018-8558","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"An information disclosure vulnerability exists when Microsoft Outlook fails to respect \"Default link type\" settings configured via the SharePoint Online Admin Center, aka \"Microsoft Outlook Information Disclosure Vulnerability.\" This affects Office 365 ProPlus, Microsoft Office. This CVE ID is unique from CVE-2018-8579.","dates":{"published":"2018-11-14T01:00:00.000Z","modified":"2024-08-05T07:02:25.441Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4,"severity":"medium","vector":"AV:N/AC:L/Au:S/C:P/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.05585,"percentile":0.92808,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.05585},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.04969,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.05585,"percentile":0.92808}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.04969,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.05585,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.05585,"percentile":0.92808}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor","description":"The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/200.html"}],"affected":[{"vendor":"microsoft","product":"microsoft office","name":"Microsoft Office","label":"microsoft office","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"2019 for 32-bit editions","noFixRecorded":false,"fixedIn":null},{"text":"2019 for 64-bit editions","noFixRecorded":false,"fixedIn":null}],"versionsText":"2019 for 32-bit editions | 2019 for 64-bit editions","eol":null,"hubHref":"/vendor/microsoft/microsoft_office"},{"vendor":"microsoft","product":"office","name":"office","label":"office","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"365 ProPlus for 32-bit Systems","noFixRecorded":false,"fixedIn":null},{"text":"365 ProPlus for 64-bit Systems","noFixRecorded":false,"fixedIn":null},{"text":"2019","noFixRecorded":false,"fixedIn":null}],"versionsText":"365 ProPlus for 32-bit Systems | 365 ProPlus for 64-bit Systems | 2019","eol":{"isEol":true,"eolDate":"2025-10-14T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"2019","label":"2019","eolFrom":"2025-10-14T00:00:00.000Z","isLts":false,"isMaintained":false,"latestVersion":null},"product":{"name":"office","label":"Microsoft Office","category":"app"}},"hubHref":"/vendor/microsoft/office"},{"vendor":"microsoft","product":"office_365_proplus","name":"office 365 proplus","label":"office_365_proplus","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/microsoft/office_365_proplus"}],"affectedCount":3,"eol":{"hasEol":true,"count":1},"references":[{"url":"http://www.securityfocus.com/bid/105826","label":"www.securityfocus.com/bid/105826","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID","Third Party Advisory"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8558","label":"portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8558","hostname":"portal.msrc.microsoft.com","tags":["X Refsource CONFIRM","Patch","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2018-11-14T01:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T07:02:25.441Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":27,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T17:24:27.777Z","stale":false,"partial":false}}