{"identifier":"CVE-2026-103409","cve":{"id":"CVE-2026-103409","description":"A Missing authentication for critical function vulnerability in Juniper Networks Session Smart Router allows an unauthenticated network-based attacker to obtain administrative privileges by passing crafted URL parameters to an insecure endpoint running as root.\n\nNote that this vulnerability can only be exploited prior to the device being onboarded to Mist/Conductor. The issue can no longer be exploited once a device is onboarded to Mist/Conductor.","published":"2026-10-28T17:17:27.840000+00:00","modified":"2026-10-28T17:17:28.083000+00:00","status":"Awaiting Analysis","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_version":"3.1","affected":[],"weaknesses":["CWE-306"],"references":[{"url":"https://supportportal.juniper.net/JSA112183","source":"sirt@juniper.net"}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"sirt@juniper.net","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}]},"configurations":[],"source":"nvd","retrieved_at":"2026-10-28T21:21:43.989459+00:00","exploited":false,"kev_stale":false,"products":[],"priority":{"label":"Critical technical severity","reasons":["CVSS is at least 9.0; exploitation is not established by severity alone."]},"epss":{"probability":0.00347,"percentile":0.28301,"date":"2026-10-29","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"supportportal.juniper.net","source_url":"https://supportportal.juniper.net/JSA112183","investigate_url":"https://investigate.aeglixmind.com/#supportportal.juniper.net"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-103409","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-103409","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-103409","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}