CVE-2025-21590
KEVJuniper Junos OS Improper Isolation or Compartmentalization Vulnerability
6.7
MediumPublished:
Last updated:
Source:sirt@juniper.net
Analyzed
Weakness (CWE)
CVSS Vector
v4.0- Attack Vector
- Local
- Attack Complexity
- Low
- Attack Requirements
- None
- Privileges Required
- High
- User Interaction
- None
- Confidentiality (Vulnerable)
- None
- Integrity (Vulnerable)
- High
- Availability (Vulnerable)
- None
- Confidentiality (Subsequent)
- None
- Integrity (Subsequent)
- None
- Availability (Subsequent)
- None
Description
An Improper Isolation or Compartmentalization vulnerability in the kernel of Juniper Networks Junos OS allows a local attacker with high privileges to compromise the integrity of the device. A local attacker with access to the shell is able to inject arbitrary code which can compromise an affected device. This issue is not exploitable from the Junos CLI. This issue affects Junos OS: * All versions before 21.2R3-S9, * 21.4 versions before 21.4R3-S10, * 22.2 versions before 22.2R3-S6, * 22.4 versions before 22.4R3-S6, * 23.2 versions before 23.2R2-S3, * 23.4 versions before 23.4R2-S4, * 24.2 versions before 24.2R1-S2, 24.2R2.
References
sirt@juniper.net
https://cloud.google.com/blog/topics/threat-intelligence/china-nexus-espionage-targets-juniper-routerssirt@juniper.net
https://supportportal.juniper.net/JSA93446134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21590