{"id":"CVE-2026-45459","aliases":["EUVD-2026-35541","GHSA-chvc-7qm7-3qgf"],"status":"published","title":"Microsoft Excel Security Feature Bypass Vulnerability","description":"Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.","severity":{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00371,"percentile":0.31349,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-693"],"published":"2026-06-09T17:05:24Z","modified":"2026-11-10T23:24:18Z","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 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-2026-45459","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45459"},{"url":"https://github.com/advisories/GHSA-chvc-7qm7-3qgf"}],"sources":{"cve":[{"id":"CVE-2026-45459","title":"Microsoft Excel Security Feature Bypass Vulnerability","description":"Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.","status":"published","published":"2026-06-09T17:05:24.602Z","modified":"2026-11-10T23:24:18.05Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C","level":"low","assessor":"cna"}],"cwes":["CWE-693"],"updated_at":"2026-11-11T00:50:10.062046Z"}],"euvd":[{"id":"EUVD-2026-35541","description":"Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.","status":"published","published":"2026-06-09T17:05:24Z","modified":"2026-11-10T23:24:18Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C","level":"low"}],"updated_at":"2026-11-11T00:24:45.886763Z"}],"ghsa":[{"id":"GHSA-chvc-7qm7-3qgf","title":"Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass...","description":"Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.","status":"published","published":"2026-06-09T18:30:49Z","modified":"2026-06-09T18:30:53Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-693"],"updated_at":"2026-11-02T15:08:41.598643Z"}],"nvd":[{"id":"CVE-2026-45459","description":"Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.","status":"published","published":"2026-06-09T17:17:20.203Z","modified":"2026-07-23T08:10:00.137Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"low","assessor":"secondary"}],"cwes":["CWE-693"],"updated_at":"2026-11-02T14:12:23.109705Z"}]}}