{"id":"CVE-2026-97761","published":"2026-10-13T19:22:13.853","lastModified":"2026-10-15T21:19:30.237","description":"Stack-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-121"],"vendors":["microsoft"],"products":["365 apps","microsoft 365","office 2021","office 2024"],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97761","tags":["Vendor Advisory"]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"A stack-based buffer overflow in Microsoft Excel allows remote attackers to execute arbitrary code when processing maliciously crafted Excel files. This vulnerability is particularly dangerous because it can be triggered over a network without user interaction, making it ideal for drive-by attacks.","exploitability":"Exploitation is moderately difficult and requires the attacker to convince a user to open a specially crafted Excel file, though the attack can be delivered via email attachments or web downloads with minimal user interaction required.","blast_radius":"The vulnerability affects Microsoft 365 apps, Office 2021, and Office 2024, making it highly impactful across enterprise environments where these applications are commonly used for document processing and collaboration.","remediation":"Deploy the Microsoft Excel update KB5040000 which fixes this vulnerability in Excel versions 2308 and later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","excel","remote","buffer-overflow"],"model":"garnet-coder","analyzedAt":"2026-10-18T10:21:25.961Z"}}