{"id":"CVE-2026-78503","aliases":["EUVD-2026-73820","GHSA-24vf-r476-3g43"],"status":"published","title":"Microsoft Office Word Information Disclosure Vulnerability","description":"Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information 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":0.00922,"percentile":0.60592,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-09-08T17:18:34Z","modified":"2026-10-31T16:17:06Z","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 365 for mac"},{"vendor":"microsoft","product":"microsoft office ltsc 2021"},{"vendor":"microsoft","product":"microsoft office ltsc 2024"},{"vendor":"microsoft","product":"microsoft office ltsc for mac 2021"},{"vendor":"microsoft","product":"microsoft office ltsc for mac 2024"},{"vendor":"microsoft","product":"microsoft word 2016"},{"vendor":"microsoft","product":"microsoft_365"},{"vendor":"microsoft","product":"office_2019"},{"vendor":"microsoft","product":"office_2021"},{"vendor":"microsoft","product":"office_2024"},{"vendor":"microsoft","product":"word"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78503","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78503"},{"url":"https://github.com/advisories/GHSA-24vf-r476-3g43"}],"sources":{"cve":[{"id":"CVE-2026-78503","title":"Microsoft Office Word Information Disclosure Vulnerability","description":"Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-09-08T17:18:34.402Z","modified":"2026-10-31T16:17:06.633Z","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-125"],"updated_at":"2026-11-02T13:34:59.78118Z"}],"euvd":[{"id":"EUVD-2026-73820","description":"Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-09-08T17:18:34Z","modified":"2026-10-31T16:17:06Z","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":"2026-11-02T16:58:56.806292Z"}],"ghsa":[{"id":"GHSA-24vf-r476-3g43","title":"Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose...","description":"Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-09-08T18:33:25Z","modified":"2026-09-08T18:33:46Z","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-125"],"updated_at":"2026-11-02T15:11:33.442964Z"}],"nvd":[{"id":"CVE-2026-78503","description":"Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-09-08T18:20:45.23Z","modified":"2026-09-17T20:18:30.593Z","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-125"],"updated_at":"2026-11-02T14:12:45.264578Z"}]}}