CVE-2026-20223: Cisco Secure Workload

Critical severity, CVSS 10.0. EPSS: 0.8% chance of exploitation in the next 30 days.

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. 

Affected products

• Cisco Secure Workload: before 3.10.8.3 (fixed in 3.10.8.3); from 4.0, before 4.0.3.17 (fixed in 4.0.3.17)

Published 2026-05-20. Last modified 2026-07-23.