August 11, 2026

CVE Watchtower


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CVE-2026-21902NVD

Vulnerability Summary

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.
Severity Level
CRITICAL(9.3)
Published Date
Feb 25, 2026
Last Modified
Feb 25, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.29%Probability
Root Weakness (CWE)
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v4.0 Base Metrics
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone