{"id":"CVE-2026-97756","published":"2026-10-13T19:22:13.237","lastModified":"2026-10-15T21:19:29.643","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-2026-97756","tags":["Patch","Vendor Advisory"]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"A heap-based buffer overflow in Microsoft Office Excel allows remote attackers to execute arbitrary code when processing malicious Excel files. This vulnerability is particularly dangerous because it can be triggered over a network without user interaction, making it ideal for remote exploitation.","exploitability":"Exploitation is moderately difficult and requires an attacker to deliver a specially crafted Excel file to a victim who has Microsoft Office installed, though the attack can be automated through web delivery or email attachments with minimal user interaction required.","blast_radius":"The vulnerability affects multiple Microsoft 365 applications including Excel, Office 2021, and Office 2024, potentially allowing widespread remote code execution across enterprise environments that use these products.","remediation":"Deploy the Microsoft Security Update KB5040497 for Office 2021 and Office 2024, or ensure all affected Microsoft 365 applications are updated to version 2408 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","excel","remote-exploitation","buffer-overflow"],"model":"garnet-coder","analyzedAt":"2026-10-18T10:21:03.925Z"}}