---
title: "CVE-2026-103402: Juniper Networks Session Smart Router & Conductor - Authentication Bypass"
description: "Juniper Networks Session Smart Router and Session Smart Conductor contain an insufficient verification of data authenticity vulnerability caused by processing unverified cache files in PCLI, letting attackers with write access to the model cache directory execute arbitrary code and escalate privileges."
url: https://panop.io/threat-heartbeat/CVE-2026-103402/
---

# CVE-2026-103402 Juniper Networks Session Smart Router & Conductor - Authentication Bypass

Juniper Networks Session Smart Router and Session Smart Conductor contain an insufficient verification of data authenticity vulnerability caused by processing unverified cache files in PCLI, letting attackers with write access to the model cache directory execute arbitrary code and escalate privileges.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-103402)

## Details

Type

Authentication Bypass

Impact

Remote Code Execution, Privilege Escalation

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

28 October 2026

Updated

29 October 2026

Weakness

[CWE-345](https://cwe.mitre.org/data/definitions/345.html)

## Vendor fix

Update to the latest version with the vulnerability fixed.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-103402](https://nvd.nist.gov/vuln/detail/CVE-2026-103402)
- [https://supportportal.juniper.net/JSA112183](https://supportportal.juniper.net/JSA112183)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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