SB2025031279 - Privilege escalation in Juniper Junos OS

Description

This security bulletin contains information about 1 security vulnerability.

1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2025-21590)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improperly imposed security restrictions. A local privileged user can compromise integrity of the device.

Note, the vulnerability is being exploited in the wild.

Remediation

Install update from vendor's website.

References

• https://cloud.google.com/blog/topics/threat-intelligence/china-nexus-espionage-targets-juniper-routers
• https://supportportal.juniper.net/JSA93446
• https://supportportal.juniper.net/s/article/2025-03-Reference-Advisory-The-RedPenguin-Malware-Incident?language=en_US