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CVE-2026-21902

CRITICAL CVSS: 9.8 Published: 2026-02-25 Modified: 2026-06-17

Description

An Incorrect Permission Assignment for Critical Resource vulnerability in the On-Box Anomaly detection framework of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated, network-based attacker to execute code as root. The On-Box Anomaly detection framework should only be reachable by other internal processes over the internal routing instance, but not over an externally exposed port. With the ability to access and manipulate the service to execute code as root a remote attacker can take complete control of the device. Please note that this service is enabled by default as no specific configuration is required. This issue affects Junos OS Evolved on PTX Series: * 25.4 versions before 25.4R1-S1-EVO, 25.4R2-EVO. This issue does not affect Junos OS Evolved versions before 25.4R1-EVO. This issue does not affect Junos OS.

Affected Platforms

Juniper Ptx10001-36MrJuniper Ptx10016Juniper Junos Os EvolvedJuniper Ptx10004Juniper Ptx10003Juniper Ptx10002-36QddJuniper Ptx10008

Weakness Type

CWE-732

References