---
id: CVE-2026-20223
title: "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.\r\n\r\nThis vulnerability …"
summary: "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.\r\n\r\nThis vulnerability …"
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-306
vendor: cisco
product: secure_workload
affected:
  - secure_workload < 3.10.8.3
  - 'secure_workload >= 4.0, < 4.0.3.17'
patched:
  - secure_workload 4.0.3.17
published: '2026-05-20'
updated: '2026-06-30'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-20223'
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-csw-pnbsa-g8WEnuy
    label: psirt@cisco.com
tags:
  - nvd
  - exploit-available
epss: 0.00835
epssPercentile: 0.55866
ingestedAt: '2026-07-01T09:50:45.859Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/HORKimhab/CVE-2026-20223'
  checkedAt: '2026-09-25T08:20:52.544Z'
exploitAvailable: true
---

## Overview

A vulnerability in the&nbsp;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&nbsp;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&nbsp;Site Admin user.&nbsp;

## Affected

- `secure_workload < 3.10.8.3`
- `secure_workload >= 4.0, < 4.0.3.17`

## Remediation

Upgrade past the affected range:

- `secure_workload 4.0.3.17`