{"id":"CVE-2026-76504","title":"A vulnerability in the API session-based authentication management of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to access an affected system with privileges of the admin user.\r\n\r\nThis vulnerability is …","summary":"A vulnerability in the API session-based authentication management of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to access an affected system with privileges of the admin user.\r\n\r\nThis vulnerability is …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-177"],"vendor":"Cisco","product":"Cisco Catalyst SD-WAN Manager","affected":["catalyst_sd-wan_manager 18.3.6","catalyst_sd-wan_manager 18.3.7","catalyst_sd-wan_manager 18.3.8","catalyst_sd-wan_manager 17.2.10","catalyst_sd-wan_manager 18.3.6.1","catalyst_sd-wan_manager 18.2.0","catalyst_sd-wan_manager 18.4.3","catalyst_sd-wan_manager 18.4.1","catalyst_sd-wan_manager 17.2.8","catalyst_sd-wan_manager 18.3.3.1","catalyst_sd-wan_manager 18.4.0","catalyst_sd-wan_manager 18.3.1","catalyst_sd-wan_manager 17.2.6","catalyst_sd-wan_manager 17.2.9","catalyst_sd-wan_manager 18.3.4","catalyst_sd-wan_manager 17.2.5","catalyst_sd-wan_manager 18.3.1.1","catalyst_sd-wan_manager 18.3.5","catalyst_sd-wan_manager 18.4.0.1","catalyst_sd-wan_manager 18.3.3","catalyst_sd-wan_manager 17.2.7","catalyst_sd-wan_manager 17.2.4","catalyst_sd-wan_manager 18.3.0"],"published":"2026-09-30","updated":"2026-09-30","sourceUpdated":"2026-09-30T13:17:20.247","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76504","references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-webauth-xr8beuuU","label":"psirt@cisco.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-30T14:05:17.354Z","slug":"CVE-2026-76504","body":"## Overview\n\nA vulnerability in the API session-based authentication management of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to access an affected system with privileges of the admin user.\r\n\r\nThis vulnerability is due to improper handling of URI encoding in an HTTP request, which allows the request to bypass an authentication rule that is intended to restrict access to a specific API endpoint. An attacker could exploit this vulnerability by sending a crafted HTTP request to the API of the affected system. A successful exploit could allow the attacker to bypass authentication and gain access to the API as the admin user.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}