Threat Intelligence / CVE / CVE-2026-20223

CVE-2026-20223

CVSS 10 (CRITICAL) · EPSS 0.1% · Priority 5.8/10 · Published 2026-05-20

As of 2026-05-21, CVE-2026-20223 is a CVSS 10 (CRITICAL-severity) vulnerability. EPSS exploitation probability 0.1%. Threadlinqs Intelligence tracks 1 threat exploiting it.

Last updated: 2026-05-21

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.

CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Weaknesses (CWE)

CWE-306

Threats tracking this CVE

Cisco Secure Workload CVE-2026-20223 — Maximum-Severity Unauthenticated Site Admin Privilege Escalation via Internal REST API Access-Validation Flaw — CRITICAL

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-csw-pnbsa-g8WEnuy

Full detection coverage & IOCs for threats exploiting CVE-2026-20223 are available via the Threadlinqs MCP server (Purple tier). View plans →

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Enriched from CVE.org, NVD (this product uses the NVD API but is not endorsed or certified by the NVD), FIRST EPSS, CISA KEV, and GitHub Security Advisories.