CVE-2026-20223 — Cisco Secure Workload
As of 2026-05-21, CVE-2026-20223 is a CRITICAL-severity vulnerability in Cisco Secure Workload, CVSS v3.1 10, EPSS 0.0% (20.0th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-20223, most recently “Cisco Secure Workload CVE-2026-20223 — Maximum-Severity Unauthenticated Site Admin Privilege Escalation via Internal REST API Access-Validation Flaw”.
Last updated: 2026-05-21
What is 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 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.
The record classifies CVE-2026-20223 under weakness class CWE-306. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 116 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 10 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - EPSS (FIRST)
- 0.0% probability of exploitation in the next 30 days, higher than 20.0% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 5.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-05-20, last modified 2026-05-21
Is CVE-2026-20223 being exploited?
It currently carries a trending score of 11 in the Threadlinqs vulnerability feed.
Affected products and versions
- Cisco: Secure Workload
How to fix CVE-2026-20223
No vendor patch reference has been recorded for CVE-2026-20223 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2026-20223
1 tracked threat in the Threadlinqs corpus references CVE-2026-20223, either in the campaign’s CVE list or as an indicator on the campaign record.
- Cisco Secure Workload CVE-2026-20223 — Maximum-Severity Unauthenticated Site Admin Privilege Escalation via Internal REST API Access-Validation Flaw — CRITICAL · 2026-05-21
Sources
Seeded from cveorg and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.
← all vulnerabilities · Markdown version · Threadlinqs Intelligence