{"id":"CVE-2026-103394","kind":"vulnerability","aliases":["CVE-2026-103394"],"related":[],"title":"Juniper Session Smart Router: improper initialization lets attackers decrypt traffic","description":"An Improper Initialization vulnerability in the SSR software in Juniper Networks Session Smart Router allows an attacker to decrypt traffic or cause a denial of service via security policy assignment.","summary":"The SSR software in Juniper's Session Smart Router has an improper initialization flaw in security policy assignment. An attacker can decrypt traffic or cause a denial of service.","severity":"low","cvss":3.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","juniper","network-gear","session-smart-router"],"not_affected_if":[],"how_to_check":"- unknown","fix":"- unknown","status":"open","published_at":"2026-10-28T17:17:23+00:00","first_seen_at":"2026-10-28T17:34:08+00:00","triaged_at":"2026-10-28T17:34:43+00:00","updated_at":"2026-10-28T17:34:43+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-28T17:34:43Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"unknown","title":"Juniper Session Smart Router: improper initialization lets attackers decrypt traffic","impact":"medium","summary":"The SSR software in Juniper's Session Smart Router has an improper initialization flaw in security policy assignment. An attacker can decrypt traffic or cause a denial of service.","category":"infrastructure","nicknames":[],"who_cares":["juniper","session-smart-router","network-gear"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Attacker decrypts traffic or disrupts the router service.","analyst_note":"Get affected versions, fixed release and attack prerequisites from the Juniper security advisory linked from the NVD entry.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Teams running Juniper Session Smart Router with the SSR software are the ones to check. The sources do not list affected versions or configurations, so unknown whether a default setup is exposed.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000525,"input_tokens":3281,"output_tokens":393,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-103394':13A,16A '-2026':12A,15A 'allow':69C 'assign':43B,84C 'attack':8A,45B,71C 'caus':50B,76C 'cve':11A,14A 'decrypt':9A,47B,73C 'denial':52B,78C 'flaw':39B 'gear':21B 'improp':5A,37B,56C 'infrastructur':17B 'initi':6A,38B,57C 'junip':1A,18B,30B,64C 'let':7A 'network':20B,65C 'network-gear':19B 'polici':42B,83C 'router':4A,25B,34B,68C 'secur':41B,82C 'servic':54B,80C 'session':2A,23B,32B,66C 'session-smart-rout':22B 'smart':3A,24B,33B,67C 'softwar':28B,62C 'ssr':27B,61C 'traffic':10A,48B,74C 'via':81C 'vulner':58C","nicknames":[],"mitigations":[],"who_affected":"Teams running Juniper Session Smart Router with the SSR software are the ones to check. The sources do not list affected versions or configurations, so unknown whether a default setup is exposed.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-28T17:17:23+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cvss_by":"sirt@juniper.net","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-103394","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103394","severity":null,"published_at":"2026-10-28T17:17:23+00:00","modified_at":"2026-10-28T17:17:23+00:00","first_seen_at":"2026-10-28T17:34:08+00:00","fetched_at":"2026-10-28T17:34:08+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}