{"id":"CVE-2026-123385","aliases":["EUVD-2026-122299","GHSA-c4m3-5gg4-g6fp"],"status":"published","title":"Microsoft Office Excel Remote Code Execution Vulnerability","description":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/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":"2026-11-14","score":0.00607,"percentile":0.49653,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2026-11-10T18:22:16Z","modified":"2026-11-10T21:33:50Z","products":[{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"vendor":"microsoft","product":"microsoft office ltsc 2021"},{"vendor":"microsoft","product":"microsoft office ltsc 2024"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-123385","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123385"},{"url":"https://github.com/advisories/GHSA-c4m3-5gg4-g6fp"}],"sources":{"cve":[{"id":"CVE-2026-123385","title":"Microsoft Office Excel Remote Code Execution Vulnerability","description":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-11-10T18:22:16.548Z","modified":"2026-11-13T18:11:01.366Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/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-121"],"updated_at":"2026-11-10T19:39:58.973959Z"}],"euvd":[{"id":"EUVD-2026-122299","description":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-11-10T18:22:16Z","modified":"2026-11-13T18:11:01Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-11T00:24:54.978715Z"}],"ghsa":[{"id":"GHSA-c4m3-5gg4-g6fp","title":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute...","description":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-11-10T21:33:49Z","modified":"2026-11-10T21:33:50Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-121"],"updated_at":"2026-11-10T21:57:54.561479Z"}],"nvd":[{"id":"CVE-2026-123385","description":"Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-11-10T19:20:42.053Z","modified":"2026-11-10T21:19:05.97Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-121"],"updated_at":"2026-11-11T00:21:54.604297Z"}]}}