CVE-2026-20223

CVE Enrichment

CVSS: 10.0 CRITICAL
EPSS: 0.84%
EPSS Percentile: 57.72%
CISA KEV: Not listed

Description

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. 

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 21-May-2026 00:16
Last Modified: 23-Jul-2026 19:10
EPSS Date: 2026-11-02
CWE: CWE-306

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:C /
                            C:H /
                            I:H /
                            A:N

Affected Products / Versions

cisco / secure_workload Source: NVD CPE · affected
Version / affected range: * · before (exclusive) 3.10.8.3
cpe:2.3:a:cisco:secure_workload:*:*:*:*:*:*:*:*
cisco / secure_workload Source: NVD CPE · affected
Version / affected range: * · from (inclusive) 4.0 · before (exclusive) 4.0.3.17
cpe:2.3:a:cisco:secure_workload:*:*:*:*:*:*:*:*

References

[email protected]

Last enrichment sync: 03-Nov-2026 03:49
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (3)

Cisco has released fixes for CVE-2026-20223, a maximum-severity flaw in Secure Workload that could let an unauthenticated remote attacker access sensitive data and alter configurations across tenant boundaries. Cisco Patches CVSS 10.0 Secure Workload Flaw Allowing Cross-Tenant Data Access
Cisco has released fixes for CVE-2026-20223, a maximum-severity Secure Workload flaw that could let unauthenticated attackers obtain Site Admin privileges through crafted REST API requests. Cisco Patches Secure Workload Flaw That Could Grant Unauthenticated Site Admin Access
The flaw, tracked as CVE-2026-20223 (CVSS score of 10/10), exists due to insufficient validation and authentication in the REST API endpoints. Cisco Patches Critical Secure Workload Vulnerability Allowing Site Admin Access

CVE (1)

Threat Actors (1)

Vendors (1)

Products (3)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.