{"id":"CVE-2026-97004","published":"2026-10-13T19:22:09.430","lastModified":"2026-10-15T21:19:26.400","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","CWE-191"],"vendors":["microsoft"],"products":["365 apps","microsoft 365","office 2021","office 2024","office online server"],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97004","tags":["Patch","Vendor Advisory"]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"A heap-based buffer overflow in Microsoft Excel allows remote attackers to execute arbitrary code when processing specially crafted Excel files. This vulnerability could enable attackers to gain full control of affected systems.","exploitability":"Exploitation requires user interaction via a malicious Excel file, making it moderately difficult but still highly impactful, with no special privileges needed for successful exploitation.","blast_radius":"If exploited, this vulnerability could affect all Microsoft 365 apps, Office 2021, Office 2024, and Office Online Server installations, potentially leading to widespread system compromise across organizations.","remediation":"Deploy the Microsoft Security Update KB5040497 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":"2026-10-18T10:19:13.345Z"}}