# CVE-2026-103407: Juniper Networks Session Smart Router path traversal in ConfigDirector

Source: https://junglewise.ai/threats/cve-2026-103407-an-improper-limitation-of-a-pathname-to-a-restricted-directory  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-28. Updated: 2026-10-28  
License: CC BY 4.0 with a link back

CVE-2026-103407 · Severity: high · CVSS 8.8 · Published 2026-10-28

ConfigDirector in Juniper's Session Smart Router and Session Smart Conductor manages SSL certificates and encryption keys for enterprise network appliances. An authenticated REST API user can exploit improper path validation to read, modify, or delete arbitrary certificate and key files on the system, potentially compromising encrypted communications or causing service disruption.

Technologies: [Juniper Networks Session Smart Conductor](https://junglewise.ai/threats/technologies/session-smart-conductor), [Juniper Networks Session Smart Router](https://junglewise.ai/threats/technologies/session-smart-router). Vendors: [Juniper Networks](https://junglewise.ai/threats/vendors/juniper-networks).

## Quick answers

**Is CVE-2026-103407 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-103407 being exploited in the wild.

**How severe is CVE-2026-103407?** High severity, with a CVSS score of 8.8, published 28 October 2026.

**Which products and versions are affected?** Juniper Networks Session Smart Router; Juniper Networks Session Smart Conductor.

**Is there a fix for CVE-2026-103407?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-103407 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-103407?** Check whether you run Juniper Networks Session Smart Conductor or Juniper Networks Session Smart Router. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An improper pathname limitation vulnerability in the ConfigDirector REST API allows authenticated users to traverse directory restrictions and access certificate and private-key files outside their intended scope. The vulnerability requires valid REST API authentication but does not require elevated privileges or user interaction. Successful exploitation enables arbitrary read, write, and delete operations on the host filesystem, potentially exposing cryptographic material or disrupting service.

## Affected products

- Juniper Networks Session Smart Router
- Juniper Networks Session Smart Conductor

## Timeline

- 2026-10-28: advisory

## References

- [https://supportportal.juniper.net/JSA112183](https://supportportal.juniper.net/JSA112183)

## Related threats

- [Juniper Session Smart Router OS command injection in AccessManager](https://junglewise.ai/threats/cve-2026-106079-an-improper-neutralization-of-special-elements-used-in-an-os)
- [Juniper Networks Session Smart Router integer underflow in DHCP decoder](https://junglewise.ai/threats/cve-2026-103411-an-integer-underflow-vulnerability-in-dhcpmessagedecoder-in)
- [Juniper Networks Session Smart Router integer overflow in DPI certificate scanner](https://junglewise.ai/threats/cve-2026-103410-an-integer-overflow-vulnerability-in-the-dpi-certificate-scanner)
- [Juniper Networks Session Smart Router missing authentication](https://junglewise.ai/threats/cve-2026-103409-a-missing-authentication-for-critical-function-vulnerability-in)
- [Juniper Networks Session Smart Router stack buffer overflow in DHCP client](https://junglewise.ai/threats/cve-2026-103408-a-stack-buffer-overflow-vulnerability-in-the-dhcp-client-in)