{"schema":"threatline.record/2","record":{"id":"CVE-2025-21590","aliases":[],"summary":"Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability","details":"Juniper Junos OS contains an improper isolation or compartmentalization vulnerability. This vulnerability could allows a local attacker with high privileges to inject arbitrary code.","categories":["Network & edge"],"product":"Junos OS","vendor":"Juniper","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-21590","source_modified_at":"2026-02-26T19:09:35.631Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Junos OS","vendor":"Juniper Networks","versions":[{"lessThan":"21.2R3-S9","status":"affected","version":"0","versionType":"semver"},{"lessThan":"21.4R3-S10","status":"affected","version":"21.4","versionType":"semver"},{"lessThan":"22.2R3-S6","status":"affected","version":"22.2","versionType":"semver"},{"lessThan":"22.4R3-S6","status":"affected","version":"22.4","versionType":"semver"},{"lessThan":"23.2R2-S3","status":"affected","version":"23.2","versionType":"semver"},{"lessThan":"23.4R2-S4","status":"affected","version":"23.4","versionType":"semver"},{"lessThan":"24.2R1-S2, 24.2R2","status":"affected","version":"24.2","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-21590","source_modified_at":"2026-02-26T19:09:35.631Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Junos OS","ecosystem":null},"version":"21.2R3-S9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-21590","source_modified_at":"2026-02-26T19:09:35.631Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Junos OS","ecosystem":null},"version":"21.4R3-S10","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2025-21590","source_modified_at":"2026-02-26T19:09:35.631Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Junos OS","ecosystem":null},"version":"22.2R3-S6","basis":"first unaffected 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List","url":"https://www.cve.org/CVERecord?id=CVE-2025-21590","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-02-26T19:09:35.631Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2025-21590","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"url":"https://supportportal.juniper.net/s/article/2025-03-Out-of-Cycle-Security-Bulletin-Junos-OS-A-local-attacker-with-shell-access-can-execute-arbitrary-code-CVE-2025-21590?language=en_US","source":"CISA KEV"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21590","source":"CISA KEV"},{"source":"CVE List","url":"https://supportportal.juniper.net/JSA93446","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://cloud.google.com/blog/topics/threat-intelligence/china-nexus-espionage-targets-juniper-routers","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21590","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"no","technical_impact":"total","assessed_at":"2025-03-14T03:55:21.999597Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"vendor and product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-02-26T19:09:35.631Z","content_hash":"cc3be292fb8ed1bfca9e83fae59df46b1e85d9a5bc20d129b917a68b9366b913"}}