{"id":"CVE-2026-100210","published":"2026-10-13T19:17:40.933","lastModified":"2026-10-15T21:16:47.980","description":"Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","cvssScore":8.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwes":["CWE-122"],"vendors":["microsoft"],"products":["365 apps","microsoft 365","office 2021","office 2024","office online server"],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100210","tags":["Patch","Vendor Advisory"]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"A heap-based buffer overflow in Microsoft Office Excel allows remote code execution when a malicious file is opened, potentially enabling attackers to run arbitrary code on affected systems with the privileges of the user who opened the file.","exploitability":"Exploitation requires user interaction via opening a malicious Excel file, making it moderately difficult to achieve without social engineering, but once triggered, provides high privilege execution capabilities.","blast_radius":"The vulnerability affects widely deployed Office applications including Excel in Microsoft 365, Office 2021, and Office 2024, potentially impacting thousands of users across enterprise environments when exploited.","remediation":"Deploy the Microsoft Security Update KB5047898 for Excel 2021 and Office 2024, or upgrade to Microsoft 365 Apps for enterprise version 2408 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","excel","office","remote"],"model":"garnet-coder","analyzedAt":"2026-10-17T08:51:18.668Z"}}