# CVE-2026-103403: Juniper Session Smart Router OS command injection in AccessManager

Source: https://junglewise.ai/threats/cve-2026-103403-an-improper-neutralization-of-special-elements-used-in-an-os  
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-2026-103403 · Severity: high · CVSS 8.8 · Published 2026-10-28

An OS command injection vulnerability in Juniper Session Smart Router and Conductor's AccessManager component allows attackers to execute arbitrary commands and delete files on the system. An authenticated or network attacker could exploit audit rule deletion functionality to gain complete control over the router or conductor, potentially disrupting network operations or compromising sensitive routing data.

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-2026-103403 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-103403 being exploited in the wild.

**How severe is CVE-2026-103403?** 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-2026-103403?** 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-2026-103403 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-103403?** 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 neutralization of special elements in OS command construction within AccessManager's audit rule deletion feature allows command injection. An attacker can inject shell metacharacters to execute arbitrary OS commands and delete files with the privileges of the AccessManager process. The vulnerability is triggered through the audit rule deletion functionality via network or local access.

## Affected products

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

## Timeline

- 2026-10-28: disclosed

## 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)