{"id":"CVE-2025-54899","aliases":["EUVD-2025-27356","GHSA-2648-39fc-pr84"],"status":"published","title":"Microsoft Excel Remote Code Execution Vulnerability","description":"Free of memory not on the heap 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":"2026-11-08","score":0.00575,"percentile":0.47745,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-590"],"published":"2025-09-09T17:00:54Z","modified":"2026-10-18T21:10:00Z","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_long_term_servicing_channel"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54899","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-54899"},{"url":"https://github.com/advisories/GHSA-2648-39fc-pr84"}],"sources":{"cve":[{"id":"CVE-2025-54899","title":"Microsoft Excel Remote Code Execution Vulnerability","description":"Free of memory not on the heap in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2025-09-09T17:00:54.798Z","modified":"2026-02-26T17:48:59.223Z","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-590"],"updated_at":"2026-11-02T14:32:27.28543Z"}],"euvd":[{"id":"EUVD-2025-27356","description":"Free of memory not on the heap in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2025-09-09T17:00:54Z","modified":"2026-02-26T17:48:59Z","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":"2026-11-02T19:48:21.16108Z"}],"ghsa":[{"id":"GHSA-2648-39fc-pr84","title":"Free of memory not on the heap in Microsoft Office Excel allows an unauthorized attacker to...","description":"Free of memory not on the heap in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2025-09-09T18:31:22Z","modified":"2025-09-09T18:31:26Z","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-590"],"updated_at":"2026-11-02T15:03:33.203079Z"}],"nvd":[{"id":"CVE-2025-54899","description":"Free of memory not on the heap in Microsoft Office Excel allows an unauthorized attacker to execute code locally.","status":"published","published":"2025-09-09T17:16:00.907Z","modified":"2026-10-18T21:10:00.12Z","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-590"],"updated_at":"2026-11-02T14:11:27.73916Z"}]}}