by Kastro
Paper/Archive/CVE-2026-103409

CVE-2026-103409

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

EPSS 0.3%CVSS 9.8
critical.is priorityof 100
35
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 28.3.283 × 205.7No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Session Smart Router< 7.0.57.0.5CNA
Session Smart Router7.1.0 – < 7.1.77.1.7CNA
Session Smart Router7.2.0 – < 7.2.37.2.3CNA

Scores by source

juniper (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

advisorysupportportal.juniper.net/JSA112183