CVE-2025-21589 (GCVE-0-2025-21589)
Vulnerability from cvelistv5 – Published: 2026-01-27 20:32 – Updated: 2026-01-27 21:28
VLAI?
Title
Session Smart Router, Session Smart Conductor, WAN Assurance Router: API Authentication Bypass vulnerability
Summary
An Authentication Bypass Using an
Alternate Path or Channel vulnerability in Juniper Networks Session Smart
Router may allows a network-based attacker to bypass authentication
and take administrative control of the device.
This issue affects Session Smart Router:
* from 5.6.7 before 5.6.17,
* from 6.0 before 6.0.8 (affected from 6.0.8),
* from 6.1 before 6.1.12-lts,
* from 6.2 before 6.2.8-lts,
* from 6.3 before 6.3.3-r2;
This issue affects Session Smart Conductor:
* from 5.6.7 before 5.6.17,
* from 6.0 before 6.0.8 (affected from 6.0.8),
* from 6.1 before 6.1.12-lts,
* from 6.2 before 6.2.8-lts,
* from 6.3 before 6.3.3-r2;
This issue affects WAN Assurance Managed Routers:
* from 5.6.7 before 5.6.17,
* from 6.0 before 6.0.8 (affected from 6.0.8),
* from 6.1 before 6.1.12-lts,
* from 6.2 before 6.2.8-lts,
* from 6.3 before 6.3.3-r2.
Severity ?
9.8 (Critical)
CWE
- CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
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Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Juniper Networks | Session Smart Router |
Affected:
5.6.7 , < 5.6.17
(semver)
Unaffected: 6.0 , < 6.0.8 (semver) Affected: 6.1 , < 6.1.12-lts (semver) Affected: 6.2 , < 6.2.8-lts (semver) Affected: 6.3 , < 6.3.3-r2 (semver) |
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"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-21589\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-27T21:27:50.309259Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-27T21:27:59.478Z\"}}], \"cna\": {\"title\": \"Session Smart Router, Session Smart Conductor, WAN Assurance Router: API Authentication Bypass vulnerability\", \"source\": {\"defect\": [\"I95-59677\"], \"advisory\": \"JSA94663\", \"discovery\": \"INTERNAL\"}, \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 9.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}, {\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 9.3, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"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\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Juniper Networks\", \"product\": \"Session Smart Router\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.6.7\", \"lessThan\": \"5.6.17\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"changes\": [{\"at\": \"6.0.8\", \"status\": \"affected\"}], \"version\": \"6.0\", \"lessThan\": \"6.0.8\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.1\", \"lessThan\": \"6.1.12-lts\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.2\", \"lessThan\": \"6.2.8-lts\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.3\", \"lessThan\": \"6.3.3-r2\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Juniper Networks\", \"product\": \"Session Smart Conductor\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.6.7\", \"lessThan\": \"5.6.17\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"changes\": [{\"at\": \"6.0.8\", \"status\": \"affected\"}], \"version\": \"6.0\", \"lessThan\": \"6.0.8\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.1\", \"lessThan\": \"6.1.12-lts\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.2\", \"lessThan\": \"6.2.8-lts\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.3\", \"lessThan\": \"6.3.3-r2\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Juniper Networks\", \"product\": \"WAN Assurance Managed Router\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.6.7\", \"lessThan\": \"5.6.17\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"changes\": [{\"at\": \"6.0.8\", \"status\": \"affected\"}], \"version\": \"6.0\", \"lessThan\": \"6.0.8\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.1\", \"lessThan\": \"6.1.12-lts\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.2\", \"lessThan\": \"6.2.8-lts\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.3\", \"lessThan\": \"6.3.3-r2\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"Juniper SIRT is not aware of any malicious exploitation of this vulnerability.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Juniper SIRT is not aware of any malicious exploitation of this vulnerability.\", \"base64\": false}]}], \"solutions\": [{\"lang\": \"en\", \"value\": \"The following software releases have\\nbeen updated to resolve this issue:\\n\\n\\n\\n\\n\\nSession Smart Router:\\u00a0SSR-5.6.17, SSR-6.1.12-lts, SSR-6.2.8-lts,\\nSSR-6.3.3-r2 and subsequent releases. \\n\\n\\n\\n\\n\\nIt is suggested to upgrade all affected systems to one of these versions of\\nsoftware. In a Conductor-managed deployment, it is sufficient to upgrade only the\\nConductor nodes and the fix will be applied automatically to all connected\\nrouters. As practical, the routers should still be upgraded to a fixed version\\nhowever they will not be vulnerable once they connect to an upgraded Conductor.\\u00a0Router patching can be confirmed once the router reaches the \\u201crunning\\\" (on 6.2 and earlier) or \\u201csynchronized\\u201d (on 6.3+) state on the Conductor\\\".\\n\\n\\u00a0\\n\\n\\n\\nThis vulnerability has been patched\\nautomatically on devices that operate with WAN Assurance (where configuration is also managed) connected\\nto the Mist Cloud. As practical, the routers should still be upgraded to a version\\ncontaining the fix.\\n\\n\\n\\nIt is important to note that when the fix is applied automatically on routers managed\\nby a Conductor or on WAN assurance, it will have no impact on data-plane\\nfunctions of the router. The application of the fix is non-disruptive to\\nproduction traffic. There may be a momentary downtime (less than 30 seconds) to\\nthe web-based management and APIs.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eThe following software releases have\\nbeen updated to resolve this issue:\u003c/p\u003e\\n\\n\u003cp\u003e\u003cbr\u003e\\n\u003cb\u003eSession Smart Router:\u003c/b\u003e\u0026nbsp;SSR-5.6.17, SSR-6.1.12-lts, SSR-6.2.8-lts,\\nSSR-6.3.3-r2 and subsequent releases. \u003c/p\u003e\\n\\n\u003cp\u003e\u003cbr\u003e\\nIt is suggested to upgrade all affected systems to one of these versions of\\nsoftware. In a Conductor-managed deployment, it is sufficient to upgrade only the\\nConductor nodes and the fix will be applied automatically to all connected\\nrouters. As practical, the routers should still be upgraded to a fixed version\\nhowever they will not be vulnerable once they connect to an upgraded Conductor.\u0026nbsp;Router patching can be confirmed once the router reaches the \\u201crunning\\\" (on 6.2 and earlier) or \\u201csynchronized\\u201d (on 6.3+) state on the Conductor\\\".\u003cbr\u003e\\n\u0026nbsp;\u003c/p\u003e\\n\\n\u003cp\u003eThis vulnerability has been patched\\nautomatically on devices that operate with WAN Assurance (where configuration is also managed) connected\\nto the Mist Cloud. As practical, the routers should still be upgraded to a version\\ncontaining the fix.\u003cbr\u003e\\n\u003cbr\u003e\\nIt is important to note that when the fix is applied automatically on routers managed\\nby a Conductor or on WAN assurance, it will have no impact on data-plane\\nfunctions of the router. The application of the fix is non-disruptive to\\nproduction traffic. There may be a momentary downtime (less than 30 seconds) to\\nthe web-based management and APIs.\u0026nbsp;\u003c/p\u003e\", \"base64\": false}]}], \"datePublic\": \"2025-02-04T17:00:00.000Z\", \"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\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"There are no known workarounds for this issue.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"There are no known workarounds for this issue.\", \"base64\": false}]}], \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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:\\u00a0\\n\\n\\n\\n * from 5.6.7 before 5.6.17,\\u00a0\\n * from 6.0 before 6.0.8 (affected from 6.0.8),\\n\\n * from 6.1 before 6.1.12-lts,\\u00a0\\n * from 6.2 before 6.2.8-lts,\\u00a0\\n * from 6.3 before 6.3.3-r2;\\u00a0\\n\\n\\n\\n\\nThis issue affects Session Smart Conductor:\\u00a0\\n\\n\\n\\n * from 5.6.7 before 5.6.17,\\u00a0\\n * from 6.0 before 6.0.8 (affected from 6.0.8),\\n\\n * from 6.1 before 6.1.12-lts,\\u00a0\\n * from 6.2 before 6.2.8-lts,\\u00a0\\n * from 6.3 before 6.3.3-r2;\\u00a0\\n\\n\\n\\n\\nThis issue affects WAN Assurance Managed Routers:\\u00a0\\n\\n\\n\\n * from 5.6.7 before 5.6.17,\\u00a0\\n * from 6.0 before 6.0.8 (affected from 6.0.8),\\n\\n * from 6.1 before 6.1.12-lts,\\u00a0\\n * from 6.2 before 6.2.8-lts,\\u00a0\\n * from 6.3 before 6.3.3-r2.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eAn 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.\u003c/p\u003e\u003cp\u003eThis issue affects Session Smart Router:\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003efrom 5.6.7 before 5.6.17,\u0026nbsp;\u003c/li\u003e\u003cli\u003e\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003efrom 6.0 before 6.0.8 (affected from 6.0.8),\u003c/span\u003e\u003cbr\u003e\u003c/li\u003e\u003cli\u003efrom 6.1 before 6.1.12-lts,\u0026nbsp;\u003c/li\u003e\u003cli\u003efrom 6.2 before 6.2.8-lts,\u0026nbsp;\u003c/li\u003e\u003cli\u003efrom 6.3 before 6.3.3-r2;\u0026nbsp;\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\u003cp\u003eThis issue affects Session Smart Conductor:\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003efrom 5.6.7 before 5.6.17,\u0026nbsp;\u003c/li\u003e\u003cli\u003e\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003efrom 6.0 before 6.0.8 (affected from 6.0.8),\u003c/span\u003e\u003cbr\u003e\u003c/li\u003e\u003cli\u003efrom 6.1 before 6.1.12-lts,\u0026nbsp;\u003c/li\u003e\u003cli\u003efrom 6.2 before 6.2.8-lts,\u0026nbsp;\u003c/li\u003e\u003cli\u003efrom 6.3 before 6.3.3-r2;\u0026nbsp;\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\u003cp\u003eThis issue affects WAN Assurance Managed Routers:\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003efrom 5.6.7 before 5.6.17,\u0026nbsp;\u003c/li\u003e\u003cli\u003e\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003efrom 6.0 before 6.0.8 (affected from 6.0.8),\u003c/span\u003e\u003cbr\u003e\u003c/li\u003e\u003cli\u003efrom 6.1 before 6.1.12-lts,\u0026nbsp;\u003c/li\u003e\u003cli\u003efrom 6.2 before 6.2.8-lts,\u0026nbsp;\u003c/li\u003e\u003cli\u003efrom 6.3 before 6.3.3-r2.\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-288\", \"description\": \"CWE-288 Authentication Bypass Using an Alternate Path or Channel\"}]}], \"providerMetadata\": {\"orgId\": \"8cbe9d5a-a066-4c94-8978-4b15efeae968\", \"shortName\": \"juniper\", \"dateUpdated\": \"2026-01-27T20:32:13.334Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-21589\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-27T21:28:02.560Z\", \"dateReserved\": \"2024-12-26T14:47:11.667Z\", \"assignerOrgId\": \"8cbe9d5a-a066-4c94-8978-4b15efeae968\", \"datePublished\": \"2026-01-27T20:32:13.334Z\", \"assignerShortName\": \"juniper\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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