{"id":"CVE-2026-103401","title":"Session Smart Router and Session Smart Conductor: An attacker can overwrite arbitrary files as root","summary":"An Improper Link Resolution Before File Access ('Link Following') vulnerability in the unauthenticated web server handlers in Juniper Networks Session Smart Router and Session Smart Conductor allows a local unprivileged user to overwrite…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-59"],"vendor":"Juniper Networks","product":"Session Smart Router","affected":["session_smart_router < 7.0.5","session_smart_router >= 7.1.0 < 7.1.7","session_smart_router >= 7.2.0 < 7.2.3","session_smart_conductor < 7.0.5","session_smart_conductor >= 7.1.0 < 7.1.7","session_smart_conductor >= 7.2.0 < 7.2.3"],"published":"2026-10-28","updated":"2026-10-28","sourceUpdated":"2026-10-28T16:34:44.566Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-103401","references":[{"url":"https://supportportal.juniper.net/JSA112183"}],"tags":["cve.org"],"ingestedAt":"2026-10-28T17:14:44.484Z","slug":"CVE-2026-103401","body":"## Overview\n\nAn Improper Link Resolution Before File Access ('Link Following') vulnerability in the unauthenticated web server handlers in Juniper Networks Session Smart Router and Session Smart Conductor allows a local unprivileged user to overwrite arbitrary files as root via unauthenticated API endpoints.\n\nThis vulnerability can be exploited on Mist-managed routers and on unmanaged Routers that have not yet been onboarded to a Conductor. Routers already managed by Conductor are not affected.\n\n## Affected\n\n- `session_smart_router < 7.0.5`\n- `session_smart_router >= 7.1.0 < 7.1.7`\n- `session_smart_router >= 7.2.0 < 7.2.3`\n- `session_smart_conductor < 7.0.5`\n- `session_smart_conductor >= 7.1.0 < 7.1.7`\n- `session_smart_conductor >= 7.2.0 < 7.2.3`\n\n## Remediation\n\nThe following software releases of Session Smart Router and Session Smart Conductor have been updated to resolve these specific issues:\n  *  7.0.5 \n\nand all subsequent releases;\n  *  7.1.7 \n\nand all subsequent releases;\n  *  7.2.3 and all subsequent releases.\n\n### Workarounds\n\nThere are no known workarounds for this issue.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}