{"id":"CVE-2026-88109","aliases":["EUVD-2026-100087","GHSA-qqr5-6qjq-ff6q"],"status":"published","title":"Microsoft Office Click-To-Run Elevation of Privilege Vulnerability","description":"Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0034,"percentile":0.27723,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2026-10-13T19:01:05Z","modified":"2026-11-10T20:43:25Z","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-2026-88109","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88109"},{"url":"https://github.com/advisories/GHSA-qqr5-6qjq-ff6q"}],"sources":{"cve":[{"id":"CVE-2026-88109","title":"Microsoft Office Click-To-Run Elevation of Privilege Vulnerability","description":"Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:01:05.688Z","modified":"2026-11-10T20:43:25.957Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-10T22:18:29.471829Z"}],"euvd":[{"id":"EUVD-2026-100087","description":"Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:01:05Z","modified":"2026-11-10T20:43:25Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T22:23:57.125737Z"}],"ghsa":[{"id":"GHSA-qqr5-6qjq-ff6q","title":"Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate...","description":"Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T21:36:38Z","modified":"2026-10-13T21:36:42Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:13:19.101875Z"}],"nvd":[{"id":"CVE-2026-88109","description":"Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-10-13T19:21:28.94Z","modified":"2026-10-15T17:32:11.98Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:12:58.13117Z"}]}}