{"id":"CVE-2026-9827","published":"2026-10-20T21:17:23.020","lastModified":"2026-10-23T23:19:51.073","description":"A arbitrary file write vulnerability exists in the boa formUploadFile functionality of X2000R (version(s): TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). A specially crafted HTTP request can lead to arbitrary code execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.","cvssScore":9.1,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","cwes":["CWE-22"],"vendors":[],"products":[],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2026-2430","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"The X2000R router's formUploadFile functionality contains a path traversal (CWE-22) flaw that allows an authenticated attacker to write arbitrary files on the device, potentially leading to remote code execution by overwriting critical system files.","exploitability":"Exploitation requires valid authentication credentials and sending a specially crafted HTTP request to the vulnerable upload endpoint; high privilege is needed per CVSS PR:H.","blast_radius":"Successful exploitation could allow full compromise of the device, including persistence, privilege escalation, and use as a pivot point within the local network.","remediation":"Upgrade to TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 or later, which contains the vendor's fix for this vulnerability.","detection":"Monitor for HTTP POST requests to /formUploadFile containing '..' in the filename parameter or unexpected file paths (e.g., outside /tmp/), especially from authenticated sessions with non-admin roles; also watch for subsequent unexpected file creation or modification in sensitive directories like /etc/ or /bin/.","tags":["path-traversal","arbitrary-file-write","rce","web","embedded","auth-bypass"],"model":"garnet-coder","analyzedAt":"2026-10-26T08:46:53.624Z"}}