{"id":"CVE-2026-40421","aliases":["EUVD-2026-29678","GHSA-m493-43x7-h3mj"],"status":"published","title":"Microsoft Word Information Disclosure Vulnerability","description":"Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose information locally.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0062,"percentile":0.50046,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-73"],"published":"2026-05-12T16:58:48Z","modified":"2026-10-26T18:10:00Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"vendor":"microsoft","product":"microsoft office 2019"},{"vendor":"microsoft","product":"microsoft office ltsc 2021"},{"vendor":"microsoft","product":"microsoft office ltsc 2024"},{"vendor":"microsoft","product":"microsoft word 2016"},{"vendor":"microsoft","product":"office"},{"vendor":"microsoft","product":"office_long_term_servicing_channel"},{"vendor":"microsoft","product":"word"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40421","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40421"},{"url":"https://github.com/advisories/GHSA-m493-43x7-h3mj"}],"sources":{"cve":[{"id":"CVE-2026-40421","title":"Microsoft Word Information Disclosure Vulnerability","description":"Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-05-12T16:58:48.71Z","modified":"2026-08-10T15:12:58.621Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-73"],"updated_at":"2026-11-02T13:43:22.599321Z"}],"euvd":[{"id":"EUVD-2026-29678","description":"Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-05-12T16:58:48Z","modified":"2026-08-10T15:12:58Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T18:02:02.39155Z"}],"ghsa":[{"id":"GHSA-m493-43x7-h3mj","title":"External control of file name or path in Microsoft Office Word allows an unauthorized attacker to...","description":"External control of file name or path in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-05-12T18:30:45Z","modified":"2026-05-12T18:30:53Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-73"],"updated_at":"2026-11-02T15:08:05.647564Z"}],"nvd":[{"id":"CVE-2026-40421","description":"Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-05-12T18:17:20.32Z","modified":"2026-10-26T18:10:00.173Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-73"],"updated_at":"2026-11-02T14:12:18.613259Z"}]}}