{"id":"CVE-2026-88196","published":"2026-10-13T19:21:41.150","lastModified":"2026-10-15T21:19:08.943","description":"Heap-based buffer overflow in Microsoft Office 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"],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88196","tags":["Vendor Advisory"]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"A heap-based buffer overflow in Microsoft Office allows remote code execution when a user opens a specially crafted document over a network. This vulnerability affects multiple Microsoft 365 and Office versions, making it particularly dangerous for enterprise environments where users frequently open documents from shared locations or email attachments.","exploitability":"Exploitation requires a user to open a malicious document, typically via email attachment or network share, with minimal preconditions beyond having Microsoft Office installed and accessible over the network.","blast_radius":"If exploited, this vulnerability could allow attackers to execute arbitrary code on affected systems with the privileges of the logged-in user, potentially leading to full system compromise and lateral movement across the enterprise network.","remediation":"Deploy the Microsoft Office update KB5042891 for Office 2021 and Office 2024, or install the latest cumulative update for Microsoft 365 Apps for enterprise.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","office","network","exploit"],"model":"garnet-coder","analyzedAt":"2026-10-18T10:17:23.045Z"}}