{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20211", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "state": "PUBLISHED", "assignerShortName": "cisco", "dateReserved": "2025-10-08T11:59:15.398Z", "datePublished": "2026-09-16T20:04:10.340Z", "dateUpdated": "2026-09-17T11:39:23.586Z"}, "containers": {"cna": {"title": "Cisco Identity Services Engine Remote Code Execution Vulnerability", "metrics": [{"format": "cvssV3_1", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}}], "descriptions": [{"lang": "en", "value": "A vulnerability in Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have valid high-privileged administrative credentials.\r\n\r\nThis vulnerability is due to insecure deserialization of Java objects by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object to an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a DoS condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored."}], "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-rce-se7bYU57", "name": "cisco-sa-ise-rce-se7bYU57"}], "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."}], "source": {"advisory": "cisco-sa-ise-rce-se7bYU57", "discovery": "EXTERNAL", "defects": ["CSCwu59400"]}, "problemTypes": [{"descriptions": [{"lang": "en", "description": "Deserialization of Untrusted Data", "type": "cwe", "cweId": "CWE-502"}]}], "affected": [{"vendor": "Cisco", "product": "Cisco Identity Services Engine Software", "versions": [{"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"}], "defaultStatus": "unknown"}], "providerMetadata": {"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco", "dateUpdated": "2026-09-16T20:04:10.340Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-20211", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-09-17T03:57:12.101305Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-17T11:39:23.586Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"cna": {"title": "Cisco Identity Services Engine Remote Code Execution Vulnerability", "source": {"defects": ["CSCwu59400"], "advisory": "cisco-sa-ise-rce-se7bYU57", "discovery": "EXTERNAL"}, "metrics": [{"format": "cvssV3_1", "cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}}], "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"}], "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-rce-se7bYU57", "name": "cisco-sa-ise-rce-se7bYU57"}], "descriptions": [{"lang": "en", "value": "A vulnerability in Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have valid high-privileged administrative credentials.\r\n\r\nThis vulnerability is due to insecure deserialization of Java objects by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object to an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a DoS condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "cwe", "cweId": "CWE-502", "description": "Deserialization of Untrusted Data"}]}], "providerMetadata": {"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco", "dateUpdated": "2026-09-16T20:04:10.340Z"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-20211", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-09-17T03:57:12.101305Z"}}}], "providerMetadata": {"shortName": "CISA-ADP", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "dateUpdated": "2026-09-17T11:31:59.704Z"}}]}, "cveMetadata": {"cveId": "CVE-2026-20211", "state": "PUBLISHED", "dateUpdated": "2026-09-16T20:04:10.340Z", "dateReserved": "2025-10-08T11:59:15.398Z", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "datePublished": "2026-09-16T20:04:10.340Z", "assignerShortName": "cisco"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"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"}]}], "source": "psirt@cisco.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have valid high-privileged administrative credentials.\r\n\r\nThis vulnerability is due to insecure deserialization of Java objects by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object to an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a DoS condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored."}], "id": "CVE-2026-20211", "lastModified": "2026-09-17T12:17:25.350", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 6.0, "source": "psirt@cisco.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20211", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-17T03:57:12.101305Z", "version": "2.0.3"}}]}, "published": "2026-09-16T20:17:22.200", "references": [{"source": "psirt@cisco.com", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-rce-se7bYU57"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "psirt@cisco.com", "type": "Secondary"}]}

{}