{"id":"CVE-2026-124183","aliases":["EUVD-2026-122307","GHSA-wwrj-7v9p-q4c5"],"status":"published","title":"Microsoft Office Excel Information Disclosure Vulnerability","description":"Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-14","score":0.009,"percentile":0.60223,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-126"],"published":"2026-11-10T18:22:20Z","modified":"2026-11-10T21:33:58Z","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"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-124183","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124183"},{"url":"https://github.com/advisories/GHSA-wwrj-7v9p-q4c5"}],"sources":{"cve":[{"id":"CVE-2026-124183","title":"Microsoft Office Excel Information Disclosure Vulnerability","description":"Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-11-10T18:22:20.828Z","modified":"2026-11-13T18:11:05.805Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-126"],"updated_at":"2026-11-10T19:39:58.973959Z"}],"euvd":[{"id":"EUVD-2026-122307","description":"Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-11-10T18:22:20Z","modified":"2026-11-13T18:11:05Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-11T00:25:03.672914Z"}],"ghsa":[{"id":"GHSA-wwrj-7v9p-q4c5","title":"Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose...","description":"Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-11-10T21:33:51Z","modified":"2026-11-10T21:33:58Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-126"],"updated_at":"2026-11-10T21:57:55.411542Z"}],"nvd":[{"id":"CVE-2026-124183","description":"Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-11-10T19:20:47.587Z","modified":"2026-11-11T02:17:13.653Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-126"],"updated_at":"2026-11-11T07:23:51.286099Z"}]}}