CVE-2026-103409

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

CRITICAL
9.8
CVSS Score
Published: October 28, 2026 at 04:36 PM UTC
Updated: October 28, 2026 at 05:17 PM UTC
1 product affected across 1 vendorSession Smart Router

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Severity
CRITICAL9.8
Exploit prediction
EPSS 0.3%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://supportportal.juniper.net/JSA112183

CVSS

9.8CRITICALjuniper
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-306

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