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CVE-2025-21589

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CVE-2025-21589

Published: Jan 27, 2026

Modified: Jan 27, 2026

PUBLISHED

CVSS v3.1

9.8

CRITICAL

Description

An Authentication Bypass Using an Alternate Path or Channel vulnerability in Juniper Networks Session Smart Router may allows a network-based attacker to bypass authentication and take administrative control of the device. This issue affects Session Smart Router:  * from 5.6.7 before 5.6.17,  * from 6.0 before 6.0.8 (affected from 6.0.8), * from 6.1 before 6.1.12-lts,  * from 6.2 before 6.2.8-lts,  * from 6.3 before 6.3.3-r2;  This issue affects Session Smart Conductor:  * from 5.6.7 before 5.6.17,  * from 6.0 before 6.0.8 (affected from 6.0.8), * from 6.1 before 6.1.12-lts,  * from 6.2 before 6.2.8-lts,  * from 6.3 before 6.3.3-r2;  This issue affects WAN Assurance Managed Routers:  * from 5.6.7 before 5.6.17,  * from 6.0 before 6.0.8 (affected from 6.0.8), * from 6.1 before 6.1.12-lts,  * from 6.2 before 6.2.8-lts,  * from 6.3 before 6.3.3-r2.

VendorProductVersions

Juniper Networks

Session Smart Router

affected
5.6.7 - < 5.6.17
unaffected
6.0 - < 6.0.8
affected
6.1 - < 6.1.12-lts
affected
6.2 - < 6.2.8-lts
affected
6.3 - < 6.3.3-r2

Juniper Networks

Session Smart Conductor

affected
5.6.7 - < 5.6.17
unaffected
6.0 - < 6.0.8
affected
6.1 - < 6.1.12-lts
affected
6.2 - < 6.2.8-lts
affected
6.3 - < 6.3.3-r2

Juniper Networks

WAN Assurance Managed Router

affected
5.6.7 - < 5.6.17
unaffected
6.0 - < 6.0.8
affected
6.1 - < 6.1.12-lts
affected
6.2 - < 6.2.8-lts
affected
6.3 - < 6.3.3-r2

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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