{"id":"CVE-2026-118296","aliases":["EUVD-2026-122563","GHSA-qj43-27w6-9862"],"status":"published","title":"Microsoft Office Excel Remote Code Execution Vulnerability","description":"Double free in Microsoft Office Excel 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":0.01079,"percentile":0.65506,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-415"],"published":"2026-11-10T18:24:45Z","modified":"2026-11-10T21:33:06Z","products":[{"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":"office online server"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118296","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118296"},{"url":"https://github.com/advisories/GHSA-qj43-27w6-9862"}],"sources":{"cve":[{"id":"CVE-2026-118296","title":"Microsoft Office Excel Remote Code Execution Vulnerability","description":"Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-11-10T18:24:45.874Z","modified":"2026-11-11T17:20:22.887Z","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-415"],"updated_at":"2026-11-10T19:39:58.44836Z"}],"euvd":[{"id":"EUVD-2026-122563","description":"Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-11-10T18:24:45Z","modified":"2026-11-11T17:20:22Z","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":"2026-11-10T23:24:34.140893Z"}],"ghsa":[{"id":"GHSA-qj43-27w6-9862","title":"Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a...","description":"Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-11-10T21:33:05Z","modified":"2026-11-10T21:33:06Z","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-415"],"updated_at":"2026-11-10T21:57:52.038337Z"}],"nvd":[{"id":"CVE-2026-118296","description":"Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-11-10T19:19:43.037Z","modified":"2026-11-10T20:18:19.593Z","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-415"],"updated_at":"2026-11-10T22:21:32.984056Z"}]}}