CVE-2026-103409
Session Smart Router: An attacker obtains administrative privileges when an unauthenticated internal endpoint is accessed
- State
- Published
- Severity
- 9.8 Critical
- Published
- Oct 28, 2026
- Updated
- Oct 28, 2026
- Reserved
- Sep 30, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | juniper |
Weaknesses
- CWE-306 Missing authentication for critical function
Affected Products
| Product | Versions |
|---|---|
Session Smart RouterJuniper Networks |
|
References
- https://supportportal.juniper.net/JSA112183vendor-advisory
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