CVE-2026-21902 (GCVE-0-2026-21902)

Vulnerability from cvelistv5 – Published: 2026-02-25 16:59 – Updated: 2026-03-04 04:55
VLAI?
Title
Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root
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 ?
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/RE:M/U:Red
CWE
  • CWE-732 - Incorrect Permission Assignment for Critical Resource
Assigner
References
Impacted products
Vendor Product Version
Juniper Networks Junos OS Evolved Affected: 25.4 , < 25.4R1-S1-EVO, 25.4R2-EVO (semver)
Unaffected: 0 , < 25.4R1-EVO (semver)
Create a notification for this product.
Date Public ?
2026-02-25 05:00
Show details on NVD website
To clipboard 

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attacker to execute code as root.\\n\\nThe 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.\\nPlease note that this service is enabled by default as no specific configuration is required.\\n\\nThis issue affects Junos OS Evolved on PTX Series:\\n\\n\\n\\n  *  25.4 versions before 25.4R1-S1-EVO, 25.4R2-EVO.\\n\\n\\n\\n\\nThis issue does not affect Junos OS Evolved versions before 25.4R1-EVO.\\n\\nThis issue does not affect Junos OS.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"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.\u003cbr\u003e\u003cbr\u003eThe 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.\u003cbr\u003ePlease note that this service is enabled by default as no specific configuration is required.\u003cbr\u003e\u003cbr\u003e\u003cp\u003eThis issue affects Junos OS Evolved on PTX Series:\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003e25.4 versions before 25.4R1-S1-EVO, 25.4R2-EVO.\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003eThis issue does not affect Junos OS Evolved versions before 25.4R1-EVO.\u003cbr\u003e\u003cbr\u003eThis issue does not affect Junos OS.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-732\", \"description\": \"CWE-732 Incorrect Permission Assignment for Critical Resource\"}]}], \"providerMetadata\": {\"orgId\": \"8cbe9d5a-a066-4c94-8978-4b15efeae968\", \"shortName\": \"juniper\", \"dateUpdated\": \"2026-02-25T16:59:10.672Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-21902\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-04T04:55:12.668Z\", \"dateReserved\": \"2026-01-05T17:32:48.709Z\", \"assignerOrgId\": \"8cbe9d5a-a066-4c94-8978-4b15efeae968\", \"datePublished\": \"2026-02-25T16:59:10.672Z\", \"assignerShortName\": \"juniper\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.