{"id":"CVE-2026-97763","published":"2026-10-13T19:22:14.117","lastModified":"2026-10-15T21:19:30.467","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-2026-97763","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 target system, but the attack can be executed remotely with no user interaction once the file is opened.","blast_radius":"The vulnerability affects all Microsoft 365 apps, Office 2021, Office 2024, and Office Online Server, potentially impacting thousands of users across an organization when exploited.","remediation":"Deploy the Microsoft Security Update KB5049327 immediately to protect against this vulnerability.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","excel","remote"],"model":"garnet-coder","analyzedAt":"2026-10-18T10:21:36.562Z"}}