CVE-2026-103409 PUBLISHED

Session Smart Router: An attacker obtains administrative privileges when an unauthenticated internal endpoint is accessed

Assigner: juniper
Reserved: 30.09.2026 Published: 28.10.2026 Updated: 28.10.2026

A Missing authentication for critical function vulnerability in Juniper Networks Session Smart Router allows an unauthenticated network-based attacker to obtain administrative privileges by passing crafted URL parameters to an insecure endpoint running as root.

Note that this vulnerability can only be exploited prior to the device being onboarded to Mist/Conductor. The issue can no longer be exploited once a device is onboarded to Mist/Conductor.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Product Status

Vendor Juniper Networks
Product Session Smart Router
Versions Default: unaffected
  • affected from 0 to 7.0.5 (excl.)
  • affected from 7.1.0 to 7.1.7 (excl.)
  • affected from 7.2.0 to 7.2.3 (excl.)

Exploits

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

Workarounds

There are no known workarounds for this issue.

Solutions

The following software releases of Session Smart Router 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.

References

Problem Types

  • CWE-306 Missing authentication for critical function CWE