{"id":"CVE-2025-21589","aliases":["EUVD-2025-206381","GHSA-vjjg-c428-g9r3"],"status":"published","title":"Session Smart Router, Session Smart Conductor, WAN Assurance Router: API Authentication Bypass vulnerability","description":"An Authentication Bypass Using an\nAlternate Path or Channel vulnerability in Juniper Networks Session Smart\nRouter may allows a network-based attacker to bypass authentication\nand take administrative control of the device.\n\nThis issue affects Session Smart Router: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2; \n\n\n\n\nThis issue affects Session Smart Conductor: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2; \n\n\n\n\nThis issue affects WAN Assurance Managed Routers: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2.","severity":{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01546,"percentile":0.75218,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-288"],"published":"2026-01-27T20:32:13Z","modified":"2026-06-17T08:43:47Z","products":[{"vendor":"juniper networks","product":"session smart conductor"},{"vendor":"juniper networks","product":"session smart router"},{"vendor":"juniper networks","product":"wan assurance managed router"}],"references":[{"url":"https://supportportal.juniper.net/","tags":["vendor-advisory"]},{"url":"https://support.juniper.net/support/eol/software/ssr/","tags":["related"]},{"url":"https://kb.juniper.net/JSA94663","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21589"},{"url":"https://support.juniper.net/support/eol/software/ssr"},{"url":"https://supportportal.juniper.net"},{"url":"https://github.com/advisories/GHSA-vjjg-c428-g9r3"}],"sources":{"cve":[{"id":"CVE-2025-21589","title":"Session Smart Router, Session Smart Conductor, WAN Assurance Router: API Authentication Bypass vulnerability","description":"An Authentication Bypass Using an\nAlternate Path or Channel vulnerability in Juniper Networks Session Smart\nRouter may allows a network-based attacker to bypass authentication\nand take administrative control of the device.\n\nThis issue affects Session Smart Router: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2; \n\n\n\n\nThis issue affects Session Smart Conductor: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2; \n\n\n\n\nThis issue affects WAN Assurance Managed Routers: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2.","status":"published","published":"2026-01-27T20:32:13.334Z","modified":"2026-01-27T21:28:02.56Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T14:32:32.702673Z"}],"euvd":[{"id":"EUVD-2025-206381","description":"An Authentication Bypass Using an\nAlternate Path or Channel vulnerability in Juniper Networks Session Smart\nRouter may allows a network-based attacker to bypass authentication\nand take administrative control of the device.\n\nThis issue affects Session Smart Router: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2; \n\n\n\n\nThis issue affects Session Smart Conductor: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2; \n\n\n\n\nThis issue affects WAN Assurance Managed Routers: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2.","status":"published","published":"2026-01-27T20:32:13Z","modified":"2026-01-27T21:28:02Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T19:48:46.818498Z"}],"ghsa":[{"id":"GHSA-vjjg-c428-g9r3","title":"An Authentication Bypass Using an\nAlternate Path or Channel vulnerability in Juniper Networks...","description":"An Authentication Bypass Using an\nAlternate Path or Channel vulnerability in Juniper Networks Session Smart\nRouter may allows a network-based attacker to bypass authentication\nand take administrative control of the device.\n\nThis issue affects Session Smart Router: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2; \n\n\n\n\nThis issue affects Session Smart Conductor: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2; \n\n\n\n\nThis issue affects WAN Assurance Managed Routers: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2.","status":"published","published":"2026-01-27T21:31:49Z","modified":"2026-01-27T21:31:56Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T15:05:56.482872Z"}],"nvd":[{"id":"CVE-2025-21589","description":"An Authentication Bypass Using an\nAlternate Path or Channel vulnerability in Juniper Networks Session Smart\nRouter may allows a network-based attacker to bypass authentication\nand take administrative control of the device.\n\nThis issue affects Session Smart Router: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2; \n\n\n\n\nThis issue affects Session Smart Conductor: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2; \n\n\n\n\nThis issue affects WAN Assurance Managed Routers: \n\n\n\n  *  from 5.6.7 before 5.6.17, \n  *  from 6.0 before 6.0.8 (affected from 6.0.8),\n\n  *  from 6.1 before 6.1.12-lts, \n  *  from 6.2 before 6.2.8-lts, \n  *  from 6.3 before 6.3.3-r2.","status":"published","published":"2026-01-27T21:15:56.04Z","modified":"2026-06-17T08:43:47.637Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T14:11:59.073638Z"}]}}