{"id":"CVE-2026-100212","published":"2026-10-13T19:17:41.213","lastModified":"2026-10-15T21:16:48.230","description":"Use after free 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-416"],"vendors":["microsoft"],"products":["365 apps","microsoft 365","office 2021","office 2024","office online server"],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100212","tags":["Patch","Vendor Advisory"]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"A use-after-free vulnerability in Microsoft Office Excel allows remote attackers to execute arbitrary code when a malicious file is opened, potentially leading to full system compromise.","exploitability":"Exploitation requires social engineering to get a user to open a crafted Excel file, with no additional preconditions needed for successful exploitation.","blast_radius":"The vulnerability affects widely deployed Office applications including Excel in Microsoft 365, Office 2021, and Office 2024, making it highly impactful across enterprise environments.","remediation":"Deploy the Microsoft Office 2021 version 2408 or later, or Microsoft Office 2024 version 2408 or later, to remediate this vulnerability.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","office","excel","remote"],"model":"garnet-coder","analyzedAt":"2026-10-17T08:51:30.691Z"}}