A critical vulnerability (CVE-2026-20223) in Cisco Secure Workload allows an unauthenticated remote attacker to gain Site Admin privileges by sending crafted requests to internal REST APIs due to insufficient access validation. This enables unauthorized reading of sensitive data and configuration changes across tenant boundaries. Cisco has released software updates to address this issue, and there are no available workarounds.
A vulnerability in the access validation of internal REST APIs of Cisco Secure Workload could allow an unauthenticated, remote attacker to access site resources with the privileges of the Site Admin role. This vulnerability is due to insufficient validation and authentication when accessing REST API endpoints. An attacker could exploit this vulnerability if they are able to send a crafted API request to an affected endpoint. A successful exploit could allow the attacker to read sensitive information and make configuration changes across tenant boundaries with the privileges of the Site Admin user. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-csw-pnbsa-g8WEnuy <br/>Security Impact Rating: Critical <br/>CVE: CVE-2026-20223