Incorrect permission assignment for critical resource in Junos OS Evolved - CVE-2026-21902
Published: February 26, 2026
Vulnerability identifier: #VU123294
CSH Severity: Critical
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Red
CVE-ID: CVE-2026-21902
CWE-ID: CWE-732
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Juniper Networks, Inc.
Affected software:
Junos OS Evolved
Junos OS Evolved
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to incorrect permissions assignment in the On-Box Anomaly detection framework. A remote non-authenticated attacker can send specially crafted data to the system and execute arbitrary code as root.
How to mitigate CVE-2026-21902
Install updates from vendor's website.