{"id":"CVE-2026-108446","aliases":["EUVD-2026-102458","GHSA-q438-8jwr-4rqf"],"status":"published","title":"Microsoft Office Excel Remote Code Execution Vulnerability","description":"Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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":0.00618,"percentile":0.50074,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2026-10-15T20:57:27Z","modified":"2026-11-10T20:34:18Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"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 online server"},{"vendor":"microsoft","product":"office_2021"},{"vendor":"microsoft","product":"office_2024"},{"vendor":"microsoft","product":"office_online_server"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108446","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-108446"},{"url":"https://github.com/advisories/GHSA-q438-8jwr-4rqf"}],"sources":{"cve":[{"id":"CVE-2026-108446","title":"Microsoft Office Excel Remote Code Execution Vulnerability","description":"Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-15T20:57:27.027Z","modified":"2026-11-10T20:34:18.669Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-10T22:18:25.731086Z"}],"euvd":[{"id":"EUVD-2026-102458","description":"Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-15T20:57:27Z","modified":"2026-11-10T20:34:18Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T21:23:24.140442Z"}],"ghsa":[{"id":"GHSA-q438-8jwr-4rqf","title":"Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a...","description":"Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-15T21:36:17Z","modified":"2026-10-15T21:36:22Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:13:49.895192Z"}],"nvd":[{"id":"CVE-2026-108446","description":"Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-15T21:17:10.2Z","modified":"2026-10-19T20:41:25.367Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:12:59.751798Z"}]}}