{"id":"CVE-2026-102858","aliases":["EUVD-2026-99041","GHSA-r6w3-7r2g-5962"],"status":"published","title":"Microsoft Office OneNote Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Microsoft Office OneNote 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":"2026-11-11","score":0.00859,"percentile":0.58896,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-10-13T18:59:28Z","modified":"2026-11-10T20:33:31Z","products":[{"vendor":"microsoft","product":"microsoft office 365 for mac"},{"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_2021"},{"vendor":"microsoft","product":"office_2024"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102858","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102858"},{"url":"https://github.com/advisories/GHSA-r6w3-7r2g-5962"}],"sources":{"cve":[{"id":"CVE-2026-102858","title":"Microsoft Office OneNote Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T18:59:28.552Z","modified":"2026-11-10T20:33:31.173Z","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-122"],"updated_at":"2026-11-10T22:18:24.949973Z"}],"euvd":[{"id":"EUVD-2026-99041","description":"Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T18:59:28Z","modified":"2026-11-10T20:33:31Z","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":"2026-11-10T21:23:24.140442Z"}],"ghsa":[{"id":"GHSA-r6w3-7r2g-5962","title":"Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute...","description":"Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T21:32:55Z","modified":"2026-10-13T21:33:00Z","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-122"],"updated_at":"2026-11-02T15:13:12.661896Z"}],"nvd":[{"id":"CVE-2026-102858","description":"Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T19:17:50.217Z","modified":"2026-10-15T21:17:00.603Z","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-122"],"updated_at":"2026-11-02T14:12:57.132005Z"}]}}