EUVD-2026-21204
GHSA-m5fr-cwvv-7qff
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:X/RE:M/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:X/RE:M/U:X
Lifecycle Timeline
4DescriptionCVE.org
A Missing Authorization vulnerability in the CLI of Juniper Networks Junos OS on MX Series allows a local, authenticated user with low privileges to execute specific commands which will lead to a complete compromise of managed devices.
Any user logged in, without requiring specific privileges, can issue 'request csds' CLI operational commands. These commands are only meant to be executed by high privileged or users designated for Juniper Device Manager (JDM) / Connected Security Distributed Services (CSDS) operations as they will impact all aspects of the devices managed via the respective MX.
This issue affects Junos OS on MX Series:
- 24.4 releases before 24.4R2-S3,
- 25.2 releases before 25.2R2.
This issue does not affect Junos OS releases before 24.4.
AnalysisAI
Juniper Networks Junos OS on MX Series allows authenticated local users with low privileges to execute 'request csds' CLI commands intended only for high-privileged administrators or CSDS operators, enabling complete compromise of managed devices. The vulnerability affects Junos OS 24.4 releases before 24.4R2-S3 and 25.2 releases before 25.2R2. No public exploit code or active exploitation has been identified at time of analysis, though the CVSS score of 6.3 reflects moderate severity with high system impact.
Technical ContextAI
This vulnerability is a missing authorization flaw (CWE-862) in Juniper's CLI implementation on MX Series routers. The 'request csds' operational commands are designed to manage Connected Security Distributed Services-a critical system for orchestrating security services across managed devices-yet the CLI parser fails to enforce privilege-level checks before accepting these commands. Authenticated users with low privileges (PR:L per CVSS:4.0) can interact directly with the CLI interface (AV:L, local attack vector) without satisfying the elevated role requirements that should gate access to infrastructure management operations. The issue affects Junos OS versions 24.4R0 through 24.4R2-S3 and 25.2R0 through 25.2R2, with earlier Junos OS releases unaffected.
RemediationAI
Vendors should apply the security patches immediately: upgrade Junos OS 24.4 systems to 24.4R2-S3 or later, and upgrade Junos OS 25.2 systems to 25.2R2 or later. Organizations unable to patch immediately should implement network-level access controls to restrict local console and SSH access to MX Series routers to authorized administrators only, and monitor CLI audit logs for 'request csds' command execution by non-administrative accounts. Consult Juniper Security Advisory JSA107872 (https://kb.juniper.net/JSA107872) for detailed patch availability and deployment guidance.
Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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