{"id":"CVE-2026-66801","published":"2026-11-10T19:21:17.250","lastModified":"2026-11-10T22:19:15.130","description":"Heap-based buffer overflow in Xbox allows an unauthorized attacker to execute code over a network.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-122"],"vendors":[],"products":[],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66801","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"A heap-based buffer overflow (CWE-122) exists in Xbox systems, allowing remote code execution without authentication due to insufficient input validation over the network. The CVSS 9.8 score indicates maximum impact across confidentiality, integrity, and availability.","exploitability":"Exploitation is highly likely for a remote attacker with no privileges or user interaction required, as the vulnerability is network-accessible and trivially exploitable given the CVSS vector.","blast_radius":"Successful exploitation could allow full system compromise of affected Xbox devices, enabling lateral movement within gaming networks, data theft, or deployment of persistent malware.","remediation":"No fixed version or patch level is specified in the published description; upgrade to the latest official firmware update from Microsoft as soon as it is released, and temporarily disable network-facing services on Xbox consoles if not required for operation.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","heap-overflow","remote-exploit","xbox","cwe122"],"model":"garnet-coder","analyzedAt":"2026-11-11T09:51:09.053Z"}}