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 arbitrary files as root via unauthenticated API endpoints. This 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.
History

Wed, 28 Oct 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Juniper
Juniper session Smart Conductor
Juniper session Smart Router
Vendors & Products Juniper
Juniper session Smart Conductor
Juniper session Smart Router

Wed, 28 Oct 2026 16:45:00 +0000

Type Values Removed Values Added
Description 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 arbitrary files as root via unauthenticated API endpoints. This 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.
Title Session Smart Router and Session Smart Conductor: An attacker can overwrite arbitrary files as root
Weaknesses CWE-59
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: juniper

Published: 2026-10-28T16:34:44.566Z

Updated: 2026-10-28T16:34:44.566Z

Reserved: 2026-09-30T14:33:03.168Z

Link: CVE-2026-103401

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-28T17:17:24.070

Modified: 2026-10-28T17:17:24.337

Link: CVE-2026-103401

cve-icon Redhat

No data.