{"@odata.context":"https://api.msrc.microsoft.com/sug/v2.0/sugodata/v2.0/en-US/$metadata#vulnerability/$entity","id":"00000000-0000-0000-0000-00000d853828","releaseDate":"2026-11-10T08:00:00-08:00","cveNumber":"CVE-2026-124194","cveTitle":"Microsoft Outlook Spoofing Vulnerability","releaseNumber":"2026-Nov","vulnType":"Security Vulnerability","latestRevisionDate":"2026-11-10T08:00:00-08:00","description":"<p>Product ui does not warn user of unsafe actions in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.</p>\n","cweList":["CWE-356: Product UI does not Warn User of Unsafe Actions"],"cweDetailsListForSearch":["cwe: CWE-356: Product UI does not Warn User of Unsafe Actions","cweUrl: https://cwe.mitre.org/data/definitions/356.html"],"unformattedDescription":"<p>Product ui does not warn user of unsafe actions in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.</p>","mitreText":"CVE-2026-124194","mitreUrl":"https://www.cve.org/CVERecord?id=CVE-2026-124194","publiclyDisclosed":"No","exploited":"Yes","latestSoftwareReleaseId":0,"latestSoftwareRelease":"Exploitation Detected","olderSoftwareReleaseId":0,"denialOfService":"N/A","tag":"Microsoft Office Outlook","issuingCna":"Microsoft","issuingCnaId":100000001,"severityId":100000002,"severity":"Moderate","impactId":100000008,"impact":"Spoofing","langCode":"en-US","baseScore":"6.5","temporalScore":"6.2","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:H/RL:O/RC:C","vectorStringSource":"Microsoft","isMariner":false,"customerActionRequired":true,"customerActionRequiredId":1,"cweDetailsList":[{"keys":["cwe","cweUrl"],"values":["CWE-356: Product UI does not Warn User of Unsafe Actions","https://cwe.mitre.org/data/definitions/356.html"]}],"articles":[{"articleType":"FAQ","description":"<p><strong>How could an attacker exploit this vulnerability?</strong></p>\n<p>An unauthenticated attacker could send a specially crafted message file and convince a user to open it in an affected version of Microsoft Outlook. Opening the file could cause Outlook to connect to an attacker-controlled network location without displaying the usual external-content warning, potentially disclosing authentication information that could be used to impersonate the user. Exploitation requires network connectivity and user interaction.</p>\n","ordinal":10000},{"articleType":"FAQ","description":"<p><strong>Is the Preview Pane an attack vector for this vulnerability?</strong></p>\n<p>No, the Preview Pane is not an attack vector.</p>\n","ordinal":10000},{"articleType":"FAQ","description":"<p><strong>According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?</strong></p>\n<p>An attacker must send a user a malicious Office file and convince them to open it.</p>\n","ordinal":10000},{"articleType":"FAQ","description":"<p><strong>According to the CVSS metrics, successful exploitation of this vulnerability could lead to major loss of confidentiality (C:H). What does that mean for this vulnerability?</strong></p>\n<p>This vulnerability discloses a user's NTLMv2 hash to the attacker who could use this to authenticate as the user.</p>\n","ordinal":10000},{"title":"Microsoft Office Outlook Spoofing Vulnerability","articleType":"100000000","description":"<p>Product ui does not warn user of unsafe actions in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.</p>\n","ordinal":10000}],"revisions":[{"cveNumber":"CVE-2026-124194","version":1,"revisionDate":"2026-11-10T08:00:00-08:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Information published.</p>\n","unformattedDescription":"Information published.","notificationNeeded":false,"notificationSent":false,"sourceId":"3b7780f4-2eda-f111-a05a-7ced8d6f0999"}]}