What is CVE-2026-20223?

CVE-2026-20223 is a critical-severity vulnerability in Cisco Secure Workload, classified under Missing Authentication for Critical Function. CVSS score: 10.0/10. Published 2026-05-20.

How severe is CVE-2026-20223?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2026-20223 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Cisco Secure Workload

CVE-2026-20223

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…

Vulnerability class: Broken Authentication

EPSS: 0.001 (20.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Cisco Secure Workload — versions 2.2.1.41, 3.2.1.18, 3.3.2.50

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

Public proof-of-concept exploits

HORKimhab/CVE-2026-20223

References

psirt@cisco.com

Frequently asked questions

What is CVE-2026-20223?: CVE-2026-20223 is a critical-severity vulnerability in Cisco Secure Workload, classified under Missing Authentication for Critical Function. CVSS score: 10.0/10. Published 2026-05-20.
How severe is CVE-2026-20223?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2026-20223 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.