{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-20182", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "state": "PUBLISHED", "assignerShortName": "cisco", "dateReserved": "2025-10-08T11:59:15.393Z", "datePublished": "2026-05-14T16:08:25.566Z", "dateUpdated": "2026-06-16T17:57:59.048Z" }, "containers": { "cna": { "title": "Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability", "metrics": [ { "format": "cvssV3_1", "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "baseScore": 10, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH" } } ], "descriptions": [ { "lang": "en", "value": "May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The section of this advisory includes Show Control Connections guidance to help with system checks. \r\n\r\nA vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system.\r\nThis vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to the affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric." } ], "references": [ { "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa2-v69WY2SW", "name": "cisco-sa-sdwan-rpa2-v69WY2SW" }, { "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk", "name": "Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The Indicators of Compromise" } ], "exploits": [ { "lang": "en", "value": "In May 2026, the Cisco Product Security Incident Response Team (PSIRT) became aware of limited exploitation of this vulnerability. Cisco strongly recommends that customers upgrade to a fixed software release to remediate this vulnerability." } ], "source": { "advisory": "cisco-sa-sdwan-rpa2-v69WY2SW", "discovery": "EXTERNAL", "defects": [ "CSCwt50498" ] }, "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Improper Authentication", "type": "cwe", "cweId": "CWE-287" } ] } ], "affected": [ { "vendor": "Cisco", "product": "Cisco Catalyst SD-WAN Controller", "versions": [ { "version": "20.6.4", "status": "affected" }, { "version": "20.9.2", "status": "affected" }, { "version": "20.3.6", "status": "affected" }, { "version": "20.7.2", "status": "affected" }, { "version": "20.7.1", "status": "affected" }, { "version": "20.5.1", "status": "affected" }, { "version": "20.6.2", "status": "affected" }, { "version": "19.3.0", "status": "affected" }, { "version": "20.6.1", "status": "affected" }, { "version": "17.2.4", "status": "affected" }, { "version": "18.2.0", "status": "affected" }, { "version": "18.4.6", "status": "affected" }, { "version": "19.1.0", "status": "affected" }, { "version": "19.2.4", "status": "affected" }, { "version": "19.2.929", "status": "affected" }, { "version": "18.3.8", "status": "affected" }, { "version": "18.4.303", "status": "affected" }, { "version": "18.3.7", "status": "affected" }, { "version": "18.4.1", "status": "affected" }, { "version": "19.2.097", "status": "affected" }, { "version": "19.2.0", "status": "affected" }, { "version": "19.2.099", "status": "affected" }, { "version": "18.3.6", "status": "affected" }, { "version": "20.4.2", "status": "affected" }, { "version": "19.0.0", "status": "affected" }, { "version": "20.9.1", "status": "affected" }, { "version": "20.3.5", "status": "affected" }, { "version": "20.3.1", "status": "affected" }, { "version": "18.3.5", "status": "affected" }, { "version": "20.6.3", "status": "affected" }, { "version": "18.4.3", "status": "affected" }, { "version": "18.4.4", "status": "affected" }, { "version": "18.3.3", "status": "affected" }, { "version": "17.2.8", "status": "affected" }, { "version": "20.8.1", "status": "affected" }, { "version": "19.2.32", "status": "affected" }, { "version": "19.2.2", "status": "affected" }, { "version": "17.2.5", "status": "affected" }, { "version": "18.4.0", "status": "affected" }, { "version": "20.4.1.1", "status": "affected" }, { "version": "20.1.3", "status": "affected" }, { "version": "20.1.2", "status": "affected" }, { "version": "17.2.10", "status": "affected" }, { "version": "19.2.098", "status": "affected" }, { "version": "20.1.1", "status": "affected" }, { "version": "17.2.6", "status": "affected" }, { "version": "19.2.1", "status": "affected" }, { "version": "18.3.4", "status": "affected" }, { "version": "20.4.1", "status": "affected" }, { "version": "17.2.9", "status": "affected" }, { "version": "19.2.31", "status": "affected" }, { "version": "19.0.1a", "status": "affected" }, { "version": "18.3.0", "status": "affected" }, { "version": "17.2.7", "status": "affected" }, { "version": "18.4.5", "status": "affected" }, { "version": "20.3.4", "status": "affected" }, { "version": "20.3.3", "status": "affected" }, { "version": "20.4.1.2", "status": "affected" }, { "version": "20.3.2", "status": "affected" }, { "version": "18.3.1", "status": "affected" }, { "version": "20.1.12", "status": "affected" }, { "version": "19.2.3", "status": "affected" }, { "version": "20.10.1", "status": "affected" }, { "version": "20.6.5", "status": "affected" }, { "version": "20.3.7", "status": "affected" }, { "version": "20.9.3", "status": "affected" }, { "version": "20.11.1", "status": "affected" }, { "version": "20.6.3.2", "status": "affected" }, { "version": "20.4.2.3", "status": "affected" }, { "version": "20.3.5.1", "status": "affected" }, { "version": "20.3.4.3", "status": "affected" }, { "version": "20.9.3.1", "status": "affected" }, { "version": "20.6.4.1", "status": "affected" }, { "version": "20.3.3.2", "status": "affected" }, { "version": "20.6.5.2", "status": "affected" }, { "version": "20.3.7.1", "status": "affected" }, { "version": "20.11.1.1", "status": "affected" }, { "version": "20.10.1.1", "status": "affected" }, { "version": "20.6.1.2", "status": "affected" }, { "version": "20.1.3.1", "status": "affected" }, { "version": "20.9.2.2", "status": "affected" }, { "version": "20.6.5.3", "status": "affected" }, { "version": "20.6.3.3", "status": "affected" }, { "version": "20.3.7.2", "status": "affected" }, { "version": "20.6.5.4", "status": "affected" }, { "version": "20.9.2.3", "status": "affected" }, { "version": "20.9.4", "status": "affected" }, { "version": "20.12.1", "status": "affected" }, { "version": "20.3.8", "status": "affected" }, { "version": "20.6.6", "status": "affected" }, { "version": "20.12.2", "status": "affected" }, { "version": "20.13.1", "status": "affected" }, { "version": "20.9.5", "status": "affected" }, { "version": "20.12.3", "status": "affected" }, { "version": "20.6.7", "status": "affected" }, { "version": "20.9.5.1", "status": "affected" }, { "version": "20.14.1", "status": "affected" }, { "version": "20.12.3.1", "status": "affected" }, { "version": "20.12.4", "status": "affected" }, { "version": "20.15.1", "status": "affected" }, { "version": "20.9.6", "status": "affected" }, { "version": "20.6.8", "status": "affected" }, { "version": "20.16.1", "status": "affected" }, { "version": "20.9.5.3", "status": "affected" }, { "version": "20.12.4.1", "status": "affected" }, { "version": "20.15.2", "status": "affected" }, { "version": "20.12.5", "status": "affected" }, { "version": "20.9.7", "status": "affected" }, { "version": "20.15.3", "status": "affected" }, { "version": "20.12.5.1", "status": "affected" }, { "version": "20.12.5.2", "status": "affected" }, { "version": "20.15.4", "status": "affected" }, { "version": "20.9.7.1", "status": "affected" }, { "version": "20.12.6", "status": "affected" }, { "version": "20.9.8", "status": "affected" }, { "version": "20.15.4.1", "status": "affected" }, { "version": "20.15.4.2", "status": "affected" }, { "version": "20.12.5.3", "status": "affected" }, { "version": "20.12.6.1", "status": "affected" }, { "version": "20.9.8.2", "status": "affected" }, { "version": "20.15.5", "status": "affected" }, { "version": "20.12.7", "status": "affected" }, { "version": "20.9.9", "status": "affected" }, { "version": "20.15.5.1", "status": "affected" }, { "version": "20.15.4.3", "status": "affected" }, { "version": "20.15.4.5", "status": "affected" }, { "version": "20.15.5.3", "status": "affected" }, { "version": "20.12.7.2", "status": "affected" }, { "version": "20.9.9.2", "status": "affected" } ], "defaultStatus": "unknown" }, { "vendor": "Cisco", "product": "Cisco Catalyst SD-WAN Manager", "versions": [ { "version": "20.1.12", "status": "affected" }, { "version": "19.2.1", "status": "affected" }, { "version": "18.4.4", "status": "affected" }, { "version": "18.4.5", "status": "affected" }, { "version": 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"19.2.3", "status": "affected" }, { "version": "18.4.501_ES", "status": "affected" }, { "version": "20.1.2", "status": "affected" }, { "version": "19.2.929", "status": "affected" }, { "version": "19.2.31", "status": "affected" }, { "version": "20.3.2", "status": "affected" }, { "version": "19.2.4", "status": "affected" }, { "version": "19.2.4.0.9", "status": "affected" }, { "version": "20.1.3.1", "status": "affected" } ], "defaultStatus": "unknown" } ], "providerMetadata": { "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco", "dateUpdated": "2026-06-16T17:57:59.048Z" } }, "adp": [ { "references": [ { "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20182", "tags": [ "government-resource" ] } ], "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-05-14T00:00:00+00:00", "options": [ { "Exploitation": "active" }, { "Automatable": "yes" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-20182" } } }, { "other": { "type": "kev", "content": { "dateAdded": "2026-05-14", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20182" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-15T03:56:08.320Z" }, "timeline": [ { "time": "2026-05-14T00:00:00.000Z", "lang": "en", "value": "CVE-2026-20182 added to CISA KEV" } ] } ] } }