{"id":"CVE-2026-78524","aliases":["EUVD-2026-73831","GHSA-cx9w-4crx-cwpr"],"status":"published","title":"Microsoft Office Remote Code Execution Vulnerability","description":"Out-of-bounds write in Microsoft Office allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/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":"2026-11-12","score":0.00819,"percentile":0.57703,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2026-09-08T17:18:40Z","modified":"2026-11-10T21:37:40Z","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 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_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-2026-78524","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78524"},{"url":"https://github.com/advisories/GHSA-cx9w-4crx-cwpr"}],"sources":{"cve":[{"id":"CVE-2026-78524","title":"Microsoft Office Remote Code Execution Vulnerability","description":"Out-of-bounds write in Microsoft Office allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-09-08T17:18:40.55Z","modified":"2026-11-10T21:37:40.238Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/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-787"],"updated_at":"2026-11-10T22:48:53.557052Z"}],"euvd":[{"id":"EUVD-2026-73831","description":"Out-of-bounds write in Microsoft Office allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-09-08T17:18:40Z","modified":"2026-11-10T21:37:40Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:19.311812Z"}],"ghsa":[{"id":"GHSA-cx9w-4crx-cwpr","title":"Out-of-bounds write in Microsoft Office allows an unauthorized attacker to execute code over a...","description":"Out-of-bounds write in Microsoft Office allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-09-08T18:33:27Z","modified":"2026-09-08T18:33:57Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:11:34.019342Z"}],"nvd":[{"id":"CVE-2026-78524","description":"Out-of-bounds write in Microsoft Office allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-09-08T18:20:48.1Z","modified":"2026-10-30T22:18:22.14Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:12:45.264578Z"}]}}