---
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'
---

## Overview

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.

## 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`

## Remediation

The following software releases of Session Smart Router and Session Smart Conductor have been updated to resolve these specific issues:
  *  7.0.5 

and all subsequent releases;
  *  7.1.7 

and all subsequent releases;
  *  7.2.3 and all subsequent releases.

### Workarounds

There are no known workarounds for this issue.