{"cve":"CVE-2025-21590","nvd":{"published":"2025-03-12T14:15:15.447","modified":"2026-10-01T18:23:34.867","status":"Analyzed","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.\n\nA local attacker with access to the shell is able to inject arbitrary code which can compromise an affected device.\nThis issue is not exploitable from the Junos CLI.\nThis issue affects Junos OS: \n\n\n\n  *  All versions before 21.2R3-S9,\n  *  21.4 versions before 21.4R3-S10, \n  *  22.2 versions before 22.2R3-S6, \n  *  22.4 versions before 22.4R3-S6, \n  *  23.2 versions before 23.2R2-S3, \n  *  23.4 versions before 23.4R2-S4,\n  *  24.2 versions before 24.2R1-S2, 24.2R2.","cvss_v4":{"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","score":6.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N","score":4.4},"cwes":["CWE-653"],"references":["https://cloud.google.com/blog/topics/threat-intelligence/china-nexus-espionage-targets-juniper-routers","https://supportportal.juniper.net/JSA93446","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21590"],"products":["juniper:junos"],"source":"nvd","synced_at":"2026-10-19T22:00:17.429720821+00:00"},"epss":{"cve":"CVE-2025-21590","score":0.01735,"percentile":0.77497,"date":"2026-10-25"},"kev":{"cve":"CVE-2025-21590","date_added":"2025-03-13","due_date":"2025-04-03","vendor":"Juniper","product":"Junos OS","known_ransomware":false},"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}