{"id":"CVE-2026-40360","aliases":["EUVD-2026-29642","GHSA-m94j-ww5w-723q"],"status":"published","title":"Microsoft Excel Information Disclosure Vulnerability","description":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/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":"2026-11-10","score":0.00408,"percentile":0.35393,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-05-12T16:58:36Z","modified":"2026-10-26T00:10:00Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"excel"},{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"vendor":"microsoft","product":"microsoft excel 2016"},{"vendor":"microsoft","product":"microsoft office 2019"},{"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"},{"vendor":"microsoft","product":"office online server"},{"vendor":"microsoft","product":"office_long_term_servicing_channel"},{"vendor":"microsoft","product":"office_online_server"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40360","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40360"},{"url":"https://github.com/advisories/GHSA-m94j-ww5w-723q"}],"sources":{"cve":[{"id":"CVE-2026-40360","title":"Microsoft Excel Information Disclosure Vulnerability","description":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-05-12T16:58:36.923Z","modified":"2026-08-10T15:12:49.077Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/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-125"],"updated_at":"2026-11-02T13:43:22.599321Z"}],"euvd":[{"id":"EUVD-2026-29642","description":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-05-12T16:58:36Z","modified":"2026-08-10T15:12:49Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T18:02:02.865075Z"}],"ghsa":[{"id":"GHSA-m94j-ww5w-723q","title":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose...","description":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-05-12T18:30:44Z","modified":"2026-05-12T18:30:50Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:08:05.647564Z"}],"nvd":[{"id":"CVE-2026-40360","description":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-05-12T18:17:14.817Z","modified":"2026-10-26T00:10:00.15Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:18.613259Z"}]}}