{"id":"CVE-2026-26109","aliases":["EUVD-2026-10675","GHSA-xfqf-gmc6-gw8v"],"status":"published","title":"Microsoft Excel Remote Code Execution Vulnerability","description":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","severity":{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/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":0.00466,"percentile":0.4067,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-03-10T17:05:19Z","modified":"2026-06-19T18:18:06Z","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-2026-26109","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26109"},{"url":"https://github.com/advisories/GHSA-xfqf-gmc6-gw8v"}],"sources":{"cve":[{"id":"CVE-2026-26109","title":"Microsoft Excel Remote Code Execution Vulnerability","description":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-03-10T17:05:19.197Z","modified":"2026-06-19T18:18:06.982Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T13:38:20.971157Z"}],"euvd":[{"id":"EUVD-2026-10675","description":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-03-10T17:05:19Z","modified":"2026-06-19T18:18:06Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T18:20:35.26548Z"}],"ghsa":[{"id":"GHSA-xfqf-gmc6-gw8v","title":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code...","description":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-03-10T18:31:21Z","modified":"2026-03-10T18:31:30Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:06:32.599326Z"}],"nvd":[{"id":"CVE-2026-26109","description":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-03-10T18:18:39.27Z","modified":"2026-06-17T10:25:44.197Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:08.98071Z"}]}}