CVE-2026-20195

{"id": "CVE-2026-20195", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20195", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-06T17:34:47.638851Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "psirt@cisco.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "psirt@cisco.com", "affectedData": [{"vendor": "Cisco", "product": "Cisco Identity Services Engine Software", "versions": [{"status": "affected", "version": "3.3.0"}, {"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": "3.3 Patch 4"}, {"status": "affected", "version": "3.4 Patch 1"}, {"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": "3.5 Patch 1"}, {"status": "affected", "version": "3.3 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"}], "defaultStatus": "unknown"}]}], "published": "2026-05-06T17:16:21.630", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-bypass-uxjRXGpb", "tags": ["Vendor Advisory"], "source": "psirt@cisco.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-204"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in an identity management API endpoint of Cisco ISE could allow an unauthenticated, remote attacker to enumerate valid user accounts on an affected device.\r\n\r\nThis vulnerability exists because error messages are observed when the affected API endpoint is called. An attacker could exploit this vulnerability by sending a series of crafted requests to the affected endpoint and analyzing the differentiated responses. A successful exploit could allow the attacker to compile a list of valid usernames on an affected system."}], "lastModified": "2026-06-29T15:27:17.027", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:identity_services_engine:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1F8D9766-8462-48B6-A997-EEF549569786", "versionEndIncluding": "3.2.0"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.3.0:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F1B9C2C1-59A4-49A0-9B74-83CCB063E55D"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DFD29A0B-0D75-4EAB-BCE0-79450EC75DD0"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch10:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "43F3A55D-D4FC-4D93-9513-94B64B21A2B4"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E6C94CC4-CC08-4DAF-A606-FDAFC92720A9"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BB069EA3-7B8C-42B5-8035-2EE5ED3F56E4"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FF8B81A6-BF44-4E5F-B167-39F61DDCA026"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "56E0F0EC-3E66-4866-89F5-89B331F3F517"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2E3E8937-2859-4A2A-91C0-05F674EF0466"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D4B14684-EB9E-405B-85FA-B62E57CB292C"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch8:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "22B752D1-9E8F-4FB7-8EEB-F9234492372B"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch9:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "85A1CC7D-FE54-4AC0-B98F-972C4B1F3189"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.4.0:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D23905E0-E525-49B1-8E5F-4EB42D186768"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "74509498-38EF-4345-9583-CEF5C26CA1D8"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CD05FF93-7B8C-4283-9DB7-E03FE98FAADF"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0F9B6A8E-E773-44A3-9266-878F0C58EB41"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D3727619-E0CA-4CA9-BE35-0C732BCF1741"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2CFB7565-3930-409C-B5DB-CE77E6ED7C42"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.5.0:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2610FD35-BC4B-41B7-9C92-E6E5264FEE54"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3FEE4377-B238-4442-9892-28CECFB2319E"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6598563B-7E32-43FB-96A7-88C53E4CE226"}], "operator": "OR"}]}], "sourceIdentifier": "psirt@cisco.com"}