{"id":"CVE-2026-123378","aliases":["EUVD-2026-122292","GHSA-7vhf-x5c8-5cjf"],"status":"published","title":"Microsoft Office Outlook Remote Code Execution Vulnerability","description":"Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/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":"2026-11-14","score":0.00478,"percentile":0.41897,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122","CWE-190"],"published":"2026-11-10T18:22:12Z","modified":"2026-11-10T21:33:56Z","products":[{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"vendor":"microsoft","product":"microsoft office ltsc 2021"},{"vendor":"microsoft","product":"microsoft office ltsc 2024"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-123378","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123378"},{"url":"https://github.com/advisories/GHSA-7vhf-x5c8-5cjf"}],"sources":{"cve":[{"id":"CVE-2026-123378","title":"Microsoft Office Outlook Remote Code Execution Vulnerability","description":"Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-11-10T18:22:12.845Z","modified":"2026-11-13T18:10:57.593Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-190","CWE-122"],"updated_at":"2026-11-10T19:39:58.973959Z"}],"euvd":[{"id":"EUVD-2026-122292","description":"Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-11-10T18:22:12Z","modified":"2026-11-13T18:10:57Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-11T00:24:54.978715Z"}],"ghsa":[{"id":"GHSA-7vhf-x5c8-5cjf","title":"Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to...","description":"Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-11-10T21:33:49Z","modified":"2026-11-10T21:33:56Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-122"],"updated_at":"2026-11-10T21:57:55.411542Z"}],"nvd":[{"id":"CVE-2026-123378","description":"Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-11-10T19:20:41.043Z","modified":"2026-11-10T21:19:05.1Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-122","CWE-190"],"updated_at":"2026-11-11T00:21:54.604297Z"}]}}