{"id":"CVE-2026-65661","aliases":["EUVD-2026-56429","GHSA-pc5m-wcc8-vwh5"],"status":"published","title":"Microsoft Office Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Microsoft Office 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":"2026-11-10","score":0.00466,"percentile":0.40711,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-08-11T17:04:54Z","modified":"2026-10-30T17:20:38Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"vendor":"microsoft","product":"microsoft office 2016"},{"vendor":"microsoft","product":"microsoft office 2019"},{"vendor":"microsoft","product":"microsoft office ltsc 2021"},{"vendor":"microsoft","product":"microsoft office ltsc 2024"},{"vendor":"microsoft","product":"office_2016"},{"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-2026-65661","tags":["vendor-advisory","patch","Vendor Advisory","Patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65661"},{"url":"https://github.com/advisories/GHSA-pc5m-wcc8-vwh5"}],"sources":{"cve":[{"id":"CVE-2026-65661","title":"Microsoft Office Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-08-11T17:04:54.481Z","modified":"2026-10-30T17:20:38.787Z","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-122"],"updated_at":"2026-11-02T13:37:02.780526Z"}],"euvd":[{"id":"EUVD-2026-56429","description":"Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-08-11T17:04:54Z","modified":"2026-10-30T17:20:38Z","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":"2026-11-02T16:59:04.768038Z"}],"ghsa":[{"id":"GHSA-pc5m-wcc8-vwh5","title":"Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code...","description":"Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-08-11T18:31:36Z","modified":"2026-08-11T18:31:44Z","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-122"],"updated_at":"2026-11-02T15:10:20.045782Z"}],"nvd":[{"id":"CVE-2026-65661","description":"Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-08-11T17:18:54.203Z","modified":"2026-08-14T15:36:38.69Z","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-122"],"updated_at":"2026-11-02T14:12:36.880938Z"}]}}