{"id":"CVE-2026-64918","title":"Insufficiently protected credentials in Microsoft Office allows an unauthorized attacker to perform spoofing over a network.","summary":"Insufficiently protected credentials in Microsoft Office allows an unauthorized attacker to perform spoofing over a network.","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cwe":["CWE-522"],"vendor":"microsoft","product":"365_apps","affected":["365_apps","office_2016","office_2019","office_2021","office_2024"],"published":"2026-09-08","updated":"2026-09-09","sourceUpdated":"2026-09-09T18:11:14.393","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-64918","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64918","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-09T15:14:15.310825Z"},"epss":0.00477,"epssPercentile":0.40211,"ingestedAt":"2026-09-08T19:08:49.604Z","slug":"CVE-2026-64918","body":"## Overview\n\nInsufficiently protected credentials in Microsoft Office allows an unauthorized attacker to perform spoofing over a network.\n\n## Affected\n\n- `365_apps`\n- `office_2016`\n- `office_2019`\n- `office_2021`\n- `office_2024`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}