CVE-2026-21902
Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root
Basic Information
- CVE State
- PUBLISHED
- Reserved Date
- January 05, 2026
- Published Date
- February 25, 2026
- Last Updated
- March 04, 2026
- Vendor
- Juniper Networks
- Product
- Junos OS Evolved
- 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.
CVSS Scores
CVSS v4.0
9.3 - CRITICAL
Vector: 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
CVSS v3.1
9.8 - CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC Information
- Exploitation
- poc
- Automatable
- Yes
- Technical Impact
- total
Exploit Status
- Exploited in the Wild
- Yes (2026-03-19 00:00:00 UTC) Source
Known Exploited Vulnerability Information
| Source | Added Date |
|---|---|
| The Shadowserver (via CIRCL) | 2026-03-19 00:00:00 UTC |
Timeline
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CVE ID Reserved
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CVE Published to Public
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Added to KEVIntel