Advisory severityCritical9.8Juniper 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; related products: Session Smart Router.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2025-21589 Source published Jan 28, 2026Source updated Jun 17, 2026

VulniPulse record published Jan 28, 2026Record updated Jun 17, 2026

CVE-2025-21589

Monitor future Juniper Networks CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery

Get CVE alerts See app features

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 4 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 4 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 4 months ago·verify at source

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.