{"id":"CVE-2026-97738","published":"2026-10-13T19:22:10.800","lastModified":"2026-10-15T21:19:27.503","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-2026-97738","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 tricking a user into opening a specially crafted Excel file, making it moderately difficult but achievable through social engineering or phishing campaigns.","blast_radius":"If exploited, this vulnerability could affect thousands of users across Microsoft 365 and Office applications, potentially leading to widespread data breaches and system compromises.","remediation":"Deploy the Microsoft Security Update KB5042819 immediately to all affected systems running Office 2021, Office 2024, or Office Online Server.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","office","excel","remote"],"model":"garnet-coder","analyzedAt":"2026-10-18T10:19:50.261Z"}}