{"id":"CVE-2026-45463","aliases":["EUVD-2026-35543","GHSA-wqhv-6ff2-ww7r"],"status":"published","title":"Microsoft Office Remote Code Execution Vulnerability","description":"Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally.","severity":{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00364,"percentile":0.3043,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121","CWE-191"],"published":"2026-06-09T17:05:25Z","modified":"2026-09-24T13:44:22Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"365_copilot"},{"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 365 for mac"},{"vendor":"microsoft","product":"microsoft office for android"},{"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_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-2026-45463","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45463"},{"url":"https://github.com/advisories/GHSA-wqhv-6ff2-ww7r"}],"sources":{"cve":[{"id":"CVE-2026-45463","title":"Microsoft Office Remote Code Execution Vulnerability","description":"Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-06-09T17:05:25.835Z","modified":"2026-09-24T13:44:22.19Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-191","CWE-121"],"updated_at":"2026-11-02T13:46:32.755125Z"}],"euvd":[{"id":"EUVD-2026-35543","description":"Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-06-09T17:05:25Z","modified":"2026-09-24T13:44:22Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T17:27:59.112143Z"}],"ghsa":[{"id":"GHSA-wqhv-6ff2-ww7r","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":"2026-06-09T18:30:49Z","modified":"2026-06-09T18:30:53Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:08:41.598643Z"}],"nvd":[{"id":"CVE-2026-45463","description":"Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-06-09T17:17:20.707Z","modified":"2026-07-23T08:10:00.137Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-121","CWE-191"],"updated_at":"2026-11-02T14:12:23.109705Z"}]}}