{"id":"CVE-2026-78504","title":"Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.","summary":"Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-121"],"vendor":"microsoft","product":"365_apps","affected":["365_apps","microsoft_365","office_2019","office_2021","office_2024","word = 2016"],"published":"2026-09-08","updated":"2026-09-17","sourceUpdated":"2026-09-17T20:18:30.727","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-78504","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78504","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-09T04:22:57.417264Z"},"epss":0.00594,"epssPercentile":0.46829,"ingestedAt":"2026-09-08T19:08:49.629Z","slug":"CVE-2026-78504","body":"## Overview\n\nStack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.\n\n## Affected\n\n- `365_apps`\n- `microsoft_365`\n- `office_2019`\n- `office_2021`\n- `office_2024`\n- `word = 2016`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}