{"id":"CVE-2026-77898","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-77898","summary":"Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over a network.","details":"Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over a network.","published":"2026-09-08T18:20:39.980","modified":"2026-09-09T10:21:32.567","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77898"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-09T10:21:32.567"}}