{"id":"CVE-2026-55139","aliases":["EUVD-2026-44217","GHSA-w2q4-mjj7-pcp4"],"status":"published","title":"Microsoft Office Information Disclosure Vulnerability","description":"Out-of-bounds read in Microsoft Office 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:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00482,"percentile":0.41886,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-07-14T17:09:04Z","modified":"2026-11-10T22:39:37Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"vendor":"microsoft","product":"microsoft office 2016"},{"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_365"},{"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-2026-55139","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55139"},{"url":"https://github.com/advisories/GHSA-w2q4-mjj7-pcp4"}],"sources":{"cve":[{"id":"CVE-2026-55139","title":"Microsoft Office Information Disclosure Vulnerability","description":"Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-07-14T17:09:04.127Z","modified":"2026-11-10T22:39:37.475Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-10T23:49:29.755102Z"}],"euvd":[{"id":"EUVD-2026-44217","description":"Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-07-14T17:09:04Z","modified":"2026-11-10T22:39:37Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-11T00:24:47.005432Z"}],"ghsa":[{"id":"GHSA-w2q4-mjj7-pcp4","title":"Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information...","description":"Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-07-14T18:32:36Z","modified":"2026-07-14T18:32:43Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:09:30.715875Z"}],"nvd":[{"id":"CVE-2026-55139","description":"Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-07-14T18:18:20.863Z","modified":"2026-07-16T16:00:53.327Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:29.489525Z"}]}}