{"id":"CVE-2026-88156","aliases":["EUVD-2026-99728","GHSA-pxgg-c4xh-w6pg"],"status":"published","title":"Microsoft Office Outlook Remote Code Execution Vulnerability","description":"Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01172,"percentile":0.67857,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2026-10-13T19:00:29Z","modified":"2026-11-10T20:40:04Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"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_2021"},{"vendor":"microsoft","product":"office_2024"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88156","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88156"},{"url":"https://github.com/advisories/GHSA-pxgg-c4xh-w6pg"}],"sources":{"cve":[{"id":"CVE-2026-88156","title":"Microsoft Office Outlook Remote Code Execution Vulnerability","description":"Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T19:00:29.906Z","modified":"2026-11-10T20:40:04.939Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-10T22:18:29.471829Z"}],"euvd":[{"id":"EUVD-2026-99728","description":"Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T19:00:29Z","modified":"2026-11-10T20:40:04Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-10T22:23:58.54025Z"}],"ghsa":[{"id":"GHSA-pxgg-c4xh-w6pg","title":"Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to...","description":"Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T21:36:47Z","modified":"2026-10-13T21:36:47Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:13:19.101875Z"}],"nvd":[{"id":"CVE-2026-88156","description":"Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-10-13T19:21:35.71Z","modified":"2026-10-15T21:19:05.207Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:12:58.13117Z"}]}}