{"id":"CVE-2026-64918","aliases":["EUVD-2026-73643","GHSA-x5mf-hm8f-322c"],"status":"published","title":"Microsoft Office Spoofing Vulnerability","description":"Insufficiently protected credentials in Microsoft Office allows an unauthorized attacker to perform spoofing over a network.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00874,"percentile":0.59195,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-522"],"published":"2026-09-08T17:16:53Z","modified":"2026-10-31T16:15:31Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"vendor":"microsoft","product":"office_2016"},{"vendor":"microsoft","product":"office_2019"},{"vendor":"microsoft","product":"office_2021"},{"vendor":"microsoft","product":"office_2024"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64918","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64918"},{"url":"https://github.com/advisories/GHSA-x5mf-hm8f-322c"}],"sources":{"cve":[{"id":"CVE-2026-64918","title":"Microsoft Office Spoofing Vulnerability","description":"Insufficiently protected credentials in Microsoft Office allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T17:16:53.178Z","modified":"2026-10-31T16:15:31.476Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T14:19:57.818032Z"}],"euvd":[{"id":"EUVD-2026-73643","description":"Insufficiently protected credentials in Microsoft Office allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T17:16:53Z","modified":"2026-10-31T16:15:31Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T16:58:57.759474Z"}],"ghsa":[{"id":"GHSA-x5mf-hm8f-322c","title":"Insufficiently protected credentials in Microsoft Office allows an unauthorized attacker to...","description":"Insufficiently protected credentials in Microsoft Office allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T18:32:07Z","modified":"2026-09-08T18:32:08Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T15:11:29.303164Z"}],"nvd":[{"id":"CVE-2026-64918","description":"Insufficiently protected credentials in Microsoft Office allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T18:18:13.72Z","modified":"2026-10-30T22:16:59.107Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T14:12:44.436435Z"}]}}