{"id":"CVE-2026-44823","aliases":["EUVD-2026-35665","GHSA-69c6-79jc-fjhr"],"status":"published","title":"Microsoft Excel Remote Code Execution Vulnerability","description":"Numeric truncation error in Microsoft Office Excel allows an unauthorized attacker to execute code 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":0.00372,"percentile":0.31388,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-197","CWE-416"],"published":"2026-06-09T17:04:34Z","modified":"2026-11-10T23:23:34Z","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 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":"microsoft_365"},{"vendor":"microsoft","product":"office online server"},{"vendor":"microsoft","product":"office_2019"},{"vendor":"microsoft","product":"office_2021"},{"vendor":"microsoft","product":"office_2024"},{"vendor":"microsoft","product":"office_online_server"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44823","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44823"},{"url":"https://github.com/advisories/GHSA-69c6-79jc-fjhr"}],"sources":{"cve":[{"id":"CVE-2026-44823","title":"Microsoft Excel Remote Code Execution Vulnerability","description":"Numeric truncation error in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-06-09T17:04:34.751Z","modified":"2026-11-10T23:23:34.743Z","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-197","CWE-416"],"updated_at":"2026-11-11T00:50:10.062046Z"}],"euvd":[{"id":"EUVD-2026-35665","description":"Numeric truncation error in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-06-09T17:04:34Z","modified":"2026-11-10T23:23:34Z","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":"2026-11-11T00:24:45.886763Z"}],"ghsa":[{"id":"GHSA-69c6-79jc-fjhr","title":"Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker...","description":"Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-06-09T18:30:48Z","modified":"2026-06-09T18:30:53Z","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-197"],"updated_at":"2026-11-02T15:08:41.598643Z"}],"nvd":[{"id":"CVE-2026-44823","description":"Numeric truncation error in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2026-06-09T17:17:18.72Z","modified":"2026-07-23T08:10:00.137Z","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-197","CWE-416"],"updated_at":"2026-11-02T14:12:23.109705Z"}]}}