Critical9.8Juniper Networks

Critical [CVE-2025-21589] Authentication Bypass Using an Alternate Path or Channel vulnerability in Juniper Networks Session Smart Router may

This critical-severity Juniper Networks advisory covers CVE-2025-21589 affecting Session Smart Router.

CVE-2025-21589 Published Jan 27, 2026Updated by vendor Jun 17, 2026

CVE-2025-21589

Affected products & platforms

Juniper NetworksSession Smart Router

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Summary

An Authentication Bypass Using an Alternate Path or Channel vulnerability in Juniper Networks Session Smart

and take administrative control of the device.

This issue affects Session Smart Router:

from 5.6.7 before 5.6.17,

This issue affects WAN Assurance Managed Routers:

Affected versions

5.6.7
6.0
6.1
6.2
6.3

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

5.6.17
6.0.8
6.1.12-lts
6.2.8-lts
6.3.3-r2

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation

Upgrade to a fixed release: 5.6.17, 6.0.8, 6.1.12-lts, 6.2.8-lts, 6.3.3-r2. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Discussion(0)

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