{"id":"CVE-2026-63521","aliases":["EUVD-2026-56423","GHSA-xc57-cq3p-j9vp"],"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 locally.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/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":"2026-11-12","score":0.00435,"percentile":0.38249,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-08-11T17:04:49Z","modified":"2026-11-10T21:58:32Z","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_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-2026-63521","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63521"},{"url":"https://github.com/advisories/GHSA-xc57-cq3p-j9vp"}],"sources":{"cve":[{"id":"CVE-2026-63521","title":"Microsoft Office Word Information Disclosure Vulnerability","description":"Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-08-11T17:04:49.235Z","modified":"2026-11-10T21:58:32.87Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/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":"2026-11-10T22:48:52.144232Z"}],"euvd":[{"id":"EUVD-2026-56423","description":"Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-08-11T17:04:49Z","modified":"2026-11-10T21:58:32Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-10T23:24:17.839385Z"}],"ghsa":[{"id":"GHSA-xc57-cq3p-j9vp","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 locally.","status":"published","published":"2026-08-11T18:31:31Z","modified":"2026-08-11T18:31:39Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:10:20.045782Z"}],"nvd":[{"id":"CVE-2026-63521","description":"Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-08-11T17:18:48.867Z","modified":"2026-08-14T17:33:26.28Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:36.499002Z"}]}}