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.
No advisories yet.
Solution
The following software releases have been updated to resolve this specific issue: 25.4R1-S1-EVO, 25.4R2-EVO*, 26.2R1-EVO*, and all subsequent releases. * Future Release
Workaround
To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to only trusted networks and hosts. Please ensure such filters only permit explicitly required connections and block all others. Also this service can be disabled by 'request pfe anomalies disable'.
Thu, 26 Feb 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Juniper Networks
Juniper Networks junos Os Evolved |
|
| Vendors & Products |
Juniper Networks
Juniper Networks junos Os Evolved |
Thu, 26 Feb 2026 06:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Wed, 25 Feb 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root | |
| Weaknesses | CWE-732 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: juniper
Published:
Updated: 2026-02-26T14:44:05.553Z
Reserved: 2026-01-05T17:32:48.709Z
Link: CVE-2026-21902
Updated: 2026-02-25T19:14:22.032Z
Status : Awaiting Analysis
Published: 2026-02-25T18:23:40.360
Modified: 2026-02-27T14:06:59.787
Link: CVE-2026-21902
No data.
OpenCVE Enrichment
Updated: 2026-02-26T13:15:15Z