{"id":"CVE-2026-88201","aliases":["EUVD-2026-99734","GHSA-hr35-whrp-rrhq"],"status":"published","title":"Microsoft Office Excel Information Disclosure Vulnerability","description":"Buffer over-read in Microsoft Office Excel 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":"2026-11-11","score":0.00626,"percentile":0.50496,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-126"],"published":"2026-10-13T19:00:30Z","modified":"2026-11-10T20:40:08Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"vendor":"microsoft","product":"microsoft office ltsc 2021"},{"vendor":"microsoft","product":"microsoft office ltsc 2024"},{"vendor":"microsoft","product":"office_2021"},{"vendor":"microsoft","product":"office_2024"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88201","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88201"},{"url":"https://github.com/advisories/GHSA-hr35-whrp-rrhq"}],"sources":{"cve":[{"id":"CVE-2026-88201","title":"Microsoft Office Excel Information Disclosure Vulnerability","description":"Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-10-13T19:00:30.418Z","modified":"2026-11-10T20:40:08.039Z","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-126"],"updated_at":"2026-11-10T22:18:29.471829Z"}],"euvd":[{"id":"EUVD-2026-99734","description":"Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-10-13T19:00:30Z","modified":"2026-11-10T20:40:08Z","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/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-10T22:23:58.54025Z"}],"ghsa":[{"id":"GHSA-hr35-whrp-rrhq","title":"Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose...","description":"Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-10-13T21:36:52Z","modified":"2026-10-13T21:36:58Z","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-126"],"updated_at":"2026-11-02T15:13:19.101875Z"}],"nvd":[{"id":"CVE-2026-88201","description":"Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-10-13T19:21:41.667Z","modified":"2026-10-14T16:52:06.44Z","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-126"],"updated_at":"2026-11-02T14:12:58.13117Z"}]}}