CVE-2026-20071 (GCVE-0-2026-20071)
Vulnerability from cvelistv5
Published
2026-09-16 20:20
Modified
2026-09-17 14:05
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-290 - Authentication Bypass by Spoofing
Summary
A vulnerability in the SSID bring-your-own-device (BYOD) onboarding workflow of Cisco ISE could allow an unauthenticated, adjacent attacker to hijack the onboarding session of another user and access protected 802.1X networks.
This vulnerability is due to insufficient authentication checks that are performed while a user is being onboarded. An attacker could exploit this vulnerability by spoofing the legitimate user and triggering a redirection to the guest web portal. A successful exploit could allow the attacker to take over the user session and gain access to the protected 802.1X network.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cisco | Cisco Identity Services Engine Software |
Version: 3.1.0 Version: 3.1.0 p1 Version: 3.1.0 p3 Version: 3.1.0 p2 Version: 3.2.0 Version: 3.1.0 p4 Version: 3.1.0 p5 Version: 3.2.0 p1 Version: 3.1.0 p6 Version: 3.2.0 p2 Version: 3.1.0 p7 Version: 3.3.0 Version: 3.2.0 p3 Version: 3.2.0 p4 Version: 3.1.0 p8 Version: 3.2.0 p5 Version: 3.2.0 p6 Version: 3.1.0 p9 Version: 3.3 Patch 2 Version: 3.3 Patch 1 Version: 3.3 Patch 3 Version: 3.4.0 Version: 3.2.0 p7 Version: 3.3 Patch 4 Version: 3.4 Patch 1 Version: 3.1.0 p10 Version: 3.3 Patch 5 Version: 3.3 Patch 6 Version: 3.4 Patch 2 Version: 3.3 Patch 7 Version: 3.4 Patch 3 Version: 3.5.0 Version: 3.4 Patch 4 Version: 3.3 Patch 8 Version: 3.2 Patch 8 Version: 3.5 Patch 1 Version: 3.3 Patch 9 Version: 3.2 Patch 9 Version: 3.4 Patch 5 Version: 3.5 Patch 3 Version: 3.5 Patch 2 Version: 3.3 Patch 10 Version: 3.3 Patch 11 Version: 3.4 Patch 6 Version: 3.2 Patch 10 Version: 3.1.0 p72 Version: 3.1.0 p11 Version: 3.3 Patch 12 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-20071",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-17T14:05:27.110491Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-17T14:05:45.971Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Cisco Identity Services Engine Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "3.1.0"
},
{
"status": "affected",
"version": "3.1.0 p1"
},
{
"status": "affected",
"version": "3.1.0 p3"
},
{
"status": "affected",
"version": "3.1.0 p2"
},
{
"status": "affected",
"version": "3.2.0"
},
{
"status": "affected",
"version": "3.1.0 p4"
},
{
"status": "affected",
"version": "3.1.0 p5"
},
{
"status": "affected",
"version": "3.2.0 p1"
},
{
"status": "affected",
"version": "3.1.0 p6"
},
{
"status": "affected",
"version": "3.2.0 p2"
},
{
"status": "affected",
"version": "3.1.0 p7"
},
{
"status": "affected",
"version": "3.3.0"
},
{
"status": "affected",
"version": "3.2.0 p3"
},
{
"status": "affected",
"version": "3.2.0 p4"
},
{
"status": "affected",
"version": "3.1.0 p8"
},
{
"status": "affected",
"version": "3.2.0 p5"
},
{
"status": "affected",
"version": "3.2.0 p6"
},
{
"status": "affected",
"version": "3.1.0 p9"
},
{
"status": "affected",
"version": "3.3 Patch 2"
},
{
"status": "affected",
"version": "3.3 Patch 1"
},
{
"status": "affected",
"version": "3.3 Patch 3"
},
{
"status": "affected",
"version": "3.4.0"
},
{
"status": "affected",
"version": "3.2.0 p7"
},
{
"status": "affected",
"version": "3.3 Patch 4"
},
{
"status": "affected",
"version": "3.4 Patch 1"
},
{
"status": "affected",
"version": "3.1.0 p10"
},
{
"status": "affected",
"version": "3.3 Patch 5"
},
{
"status": "affected",
"version": "3.3 Patch 6"
},
{
"status": "affected",
"version": "3.4 Patch 2"
},
{
"status": "affected",
"version": "3.3 Patch 7"
},
{
"status": "affected",
"version": "3.4 Patch 3"
},
{
"status": "affected",
"version": "3.5.0"
},
{
"status": "affected",
"version": "3.4 Patch 4"
},
{
"status": "affected",
"version": "3.3 Patch 8"
},
{
"status": "affected",
"version": "3.2 Patch 8"
},
{
"status": "affected",
"version": "3.5 Patch 1"
},
{
"status": "affected",
"version": "3.3 Patch 9"
},
{
"status": "affected",
"version": "3.2 Patch 9"
},
{
"status": "affected",
"version": "3.4 Patch 5"
},
{
"status": "affected",
"version": "3.5 Patch 3"
},
{
"status": "affected",
"version": "3.5 Patch 2"
},
{
"status": "affected",
"version": "3.3 Patch 10"
},
{
"status": "affected",
"version": "3.3 Patch 11"
},
{
"status": "affected",
"version": "3.4 Patch 6"
},
{
"status": "affected",
"version": "3.2 Patch 10"
},
{
"status": "affected",
"version": "3.1.0 p72"
},
{
"status": "affected",
"version": "3.1.0 p11"
},
{
"status": "affected",
"version": "3.3 Patch 12"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the SSID bring-your-own-device (BYOD) onboarding workflow of Cisco ISE could allow an unauthenticated, adjacent attacker to hijack the onboarding session of\u0026nbsp;another user and access protected 802.1X networks. \u0026nbsp;\r\n\r\nThis vulnerability is due to insufficient authentication checks that are performed while a user is being onboarded. An attacker could exploit this vulnerability by spoofing the legitimate user and triggering\u0026nbsp;a redirection to the guest web portal. A successful exploit could allow the attacker to take over the user session and gain access to the protected 802.1X network."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 3.8,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-290",
"description": "Authentication Bypass by Spoofing",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-16T20:20:46.923Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-ise-multi-vuln-kWLeNnRD",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-vuln-kWLeNnRD"
}
],
"source": {
"advisory": "cisco-sa-ise-multi-vuln-kWLeNnRD",
"defects": [
"CSCwp98022"
],
"discovery": "EXTERNAL"
},
"title": "ISE 802.1x Session Hijack Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-20071",
"datePublished": "2026-09-16T20:20:46.923Z",
"dateReserved": "2025-10-08T11:59:15.357Z",
"dateUpdated": "2026-09-17T14:05:45.971Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-20071\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-17T14:05:27.110491Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-17T14:05:41.575Z\"}}], \"cna\": {\"title\": \"ISE 802.1x Session Hijack Vulnerability\", \"source\": {\"defects\": [\"CSCwp98022\"], \"advisory\": \"cisco-sa-ise-multi-vuln-kWLeNnRD\", \"discovery\": \"EXTERNAL\"}, \"metrics\": [{\"format\": \"cvssV3_1\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 3.8, \"attackVector\": \"ADJACENT_NETWORK\", \"baseSeverity\": \"LOW\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco Identity Services Engine Software\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.1.0\"}, {\"status\": \"affected\", \"version\": \"3.1.0 p1\"}, {\"status\": \"affected\", \"version\": \"3.1.0 p3\"}, {\"status\": \"affected\", \"version\": \"3.1.0 p2\"}, {\"status\": \"affected\", \"version\": \"3.2.0\"}, {\"status\": \"affected\", \"version\": \"3.1.0 p4\"}, {\"status\": \"affected\", \"version\": \"3.1.0 p5\"}, {\"status\": \"affected\", \"version\": \"3.2.0 p1\"}, {\"status\": \"affected\", \"version\": \"3.1.0 p6\"}, {\"status\": \"affected\", \"version\": \"3.2.0 p2\"}, {\"status\": \"affected\", \"version\": \"3.1.0 p7\"}, {\"status\": \"affected\", \"version\": \"3.3.0\"}, {\"status\": \"affected\", \"version\": \"3.2.0 p3\"}, {\"status\": \"affected\", \"version\": \"3.2.0 p4\"}, {\"status\": \"affected\", \"version\": \"3.1.0 p8\"}, {\"status\": \"affected\", \"version\": \"3.2.0 p5\"}, {\"status\": \"affected\", \"version\": \"3.2.0 p6\"}, {\"status\": \"affected\", \"version\": \"3.1.0 p9\"}, {\"status\": \"affected\", \"version\": \"3.3 Patch 2\"}, {\"status\": \"affected\", \"version\": \"3.3 Patch 1\"}, {\"status\": \"affected\", \"version\": \"3.3 Patch 3\"}, {\"status\": \"affected\", \"version\": \"3.4.0\"}, {\"status\": \"affected\", \"version\": \"3.2.0 p7\"}, {\"status\": \"affected\", \"version\": \"3.3 Patch 4\"}, {\"status\": \"affected\", \"version\": \"3.4 Patch 1\"}, {\"status\": \"affected\", \"version\": \"3.1.0 p10\"}, {\"status\": \"affected\", \"version\": \"3.3 Patch 5\"}, {\"status\": \"affected\", \"version\": \"3.3 Patch 6\"}, {\"status\": \"affected\", \"version\": \"3.4 Patch 2\"}, {\"status\": \"affected\", \"version\": \"3.3 Patch 7\"}, {\"status\": \"affected\", \"version\": \"3.4 Patch 3\"}, {\"status\": \"affected\", \"version\": \"3.5.0\"}, {\"status\": \"affected\", \"version\": \"3.4 Patch 4\"}, {\"status\": \"affected\", \"version\": \"3.3 Patch 8\"}, {\"status\": \"affected\", \"version\": \"3.2 Patch 8\"}, {\"status\": \"affected\", \"version\": \"3.5 Patch 1\"}, {\"status\": \"affected\", \"version\": \"3.3 Patch 9\"}, {\"status\": \"affected\", \"version\": \"3.2 Patch 9\"}, {\"status\": \"affected\", \"version\": \"3.4 Patch 5\"}, {\"status\": \"affected\", \"version\": \"3.5 Patch 3\"}, {\"status\": \"affected\", \"version\": \"3.5 Patch 2\"}, {\"status\": \"affected\", \"version\": \"3.3 Patch 10\"}, {\"status\": \"affected\", \"version\": \"3.3 Patch 11\"}, {\"status\": \"affected\", \"version\": \"3.4 Patch 6\"}, {\"status\": \"affected\", \"version\": \"3.2 Patch 10\"}, {\"status\": \"affected\", \"version\": \"3.1.0 p72\"}, {\"status\": \"affected\", \"version\": \"3.1.0 p11\"}, {\"status\": \"affected\", \"version\": \"3.3 Patch 12\"}], \"defaultStatus\": \"unknown\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-vuln-kWLeNnRD\", \"name\": \"cisco-sa-ise-multi-vuln-kWLeNnRD\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the SSID bring-your-own-device (BYOD) onboarding workflow of Cisco ISE could allow an unauthenticated, adjacent attacker to hijack the onboarding session of\u0026nbsp;another user and access protected 802.1X networks. \u0026nbsp;\\r\\n\\r\\nThis vulnerability is due to insufficient authentication checks that are performed while a user is being onboarded. An attacker could exploit this vulnerability by spoofing the legitimate user and triggering\u0026nbsp;a redirection to the guest web portal. A successful exploit could allow the attacker to take over the user session and gain access to the protected 802.1X network.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-290\", \"description\": \"Authentication Bypass by Spoofing\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-09-16T20:20:46.923Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-20071\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-17T14:05:45.971Z\", \"dateReserved\": \"2025-10-08T11:59:15.357Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-09-16T20:20:46.923Z\", \"assignerShortName\": \"cisco\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…