{"id":"CVE-2026-40418","aliases":["EUVD-2026-29675","GHSA-89vp-6c77-3jr6"],"status":"published","title":"Microsoft Office Click-To-Run Elevation of Privilege Vulnerability","description":"Use after free in Microsoft Office 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":"2026-11-10","score":0.00254,"percentile":0.17152,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2026-05-12T16:59:27Z","modified":"2026-10-26T18:10:00Z","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":"office"},{"vendor":"microsoft","product":"office_long_term_servicing_channel"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40418","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40418"},{"url":"https://github.com/advisories/GHSA-89vp-6c77-3jr6"}],"sources":{"cve":[{"id":"CVE-2026-40418","title":"Microsoft Office Click-To-Run Elevation of Privilege Vulnerability","description":"Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T16:59:27.93Z","modified":"2026-08-10T15:13:35.964Z","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":"2026-11-02T13:43:22.599321Z"}],"euvd":[{"id":"EUVD-2026-29675","description":"Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T16:59:27Z","modified":"2026-08-10T15:13:35Z","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":"2026-11-02T18:02:02.39155Z"}],"ghsa":[{"id":"GHSA-89vp-6c77-3jr6","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":"2026-05-12T18:30:45Z","modified":"2026-05-12T18:30:54Z","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":"2026-11-02T15:08:05.647564Z"}],"nvd":[{"id":"CVE-2026-40418","description":"Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-05-12T18:17:19.94Z","modified":"2026-10-26T18:10:00.173Z","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":"2026-11-02T14:12:18.613259Z"}]}}