CVE-2026-103409
A Missing authentication for critical function vulnerability in Juniper Networks Session Smart…
- Risk score
- 64/100
- CVSS
- 9.8 v3.1
- Published
- 28 Oct 2026
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What to know
- What it is
- A missing authentication vulnerability in Juniper Networks Session Smart Router allows an unauthenticated attacker to obtain administrative privileges by passing crafted URL parameters. This can only be exploited before the device is onboarded to Mist/Conductor.
- Affected
- {'product': 'Juniper Networks Session Smart Router', 'versions': 'prior to onboarding to Mist/Conductor'}
- Fix
- Check the linked advisory for details on mitigation or upgrade instructions
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 9.8 critical
- Remotely exploitable without logging in
References
Original 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.
Last activity 28 Oct 2026. Patch Forecast updates every hour.