{"id":"CVE-2026-68816","aliases":["EUVD-2026-56466","GHSA-4x7r-w35q-cr5x"],"status":"published","title":"Microsoft Excel Remote Code Execution Vulnerability","description":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/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":0.00466,"percentile":0.40835,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2026-08-11T17:05:14Z","modified":"2026-11-10T21:58:57Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"excel"},{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"vendor":"microsoft","product":"microsoft excel 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 online server"},{"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-2026-68816","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68816"},{"url":"https://github.com/advisories/GHSA-4x7r-w35q-cr5x"}],"sources":{"cve":[{"id":"CVE-2026-68816","title":"Microsoft Excel Remote Code Execution Vulnerability","description":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-08-11T17:05:14.928Z","modified":"2026-11-10T21:58:57.869Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/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-121"],"updated_at":"2026-11-10T22:48:52.144232Z"}],"euvd":[{"id":"EUVD-2026-56466","description":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-08-11T17:05:14Z","modified":"2026-11-10T21:58:57Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:17.839385Z"}],"ghsa":[{"id":"GHSA-4x7r-w35q-cr5x","title":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute...","description":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-08-11T18:31:45Z","modified":"2026-08-11T18:31:45Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:10:20.045782Z"}],"nvd":[{"id":"CVE-2026-68816","description":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-08-11T17:19:05.953Z","modified":"2026-08-13T16:18:55.077Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:12:36.880938Z"}]}}