CVE-2026-20223
Cisco Secure Workload Unauthorized API Access Vulnerability
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.
INFO
Published Date :
May 20, 2026, 5:16 p.m.
Last Modified :
May 20, 2026, 5:30 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Cisco Secure Workload to the latest version.
- Implement strict access controls for REST APIs.
- Validate all user authentication and authorization.
- Restrict access to sensitive site resources.
Public PoC/Exploit Available at Github
CVE-2026-20223 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-20223.
| URL | Resource |
|---|---|
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-csw-pnbsa-g8WEnuy |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-20223 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-20223
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
CVE-2026-20223
Python Shell
None
TypeScript Batchfile JavaScript Dockerfile HTML CSS Shell PowerShell Go PLpgSQL
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-20223 vulnerability anywhere in the article.
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TheCyberThrone
CISA adds Langflow and Trend Micro Apex One to KEV
May 22, 2026CVE-2025-34291 — Langflow Origin Validation Error (RCE)CVSS: 9.4CWE: CWE-346 — Origin Validation ErrorAffected Versions: Langflow ≤ 1.6.9Vulnerability SummaryResearchers at Obsidian Securi ... Read more
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The Cyber Express
Microsoft Patches Actively Exploited Defender Vulnerabilities Affecting Enterprise Systems
Microsoft has confirmed active exploitation of two security vulnerabilities in its security ecosystem, identified as CVE-2026-41091 and CVE-2026-45498, both evaluated under the CVSS scoring system. Th ... Read more
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The Cyber Express
Cisco Secure Workload Flaw CVE-2026-20223 Gets Maximum CVSS 10 Rating
Cisco has released security updates to fix a critical vulnerability, tracked as CVE-2026-20223, affecting its Cisco Secure Workload platform. The flaw, which received the maximum CVSS score of 10.0, c ... Read more
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The Hacker News
Cisco Patches CVSS 10.0 Secure Workload REST API Flaw Enabling Data Access
Cisco has rolled out updates for a maximum-severity security flaw impacting Secure Workload that could allow an unauthenticated, remote attacker to access sensitive data. Tracked as CVE-2026-20223 (CV ... Read more
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TheCyberThrone
CVE-2026-20223 — Cisco Secure Workload Authentication Bypass
May 22, 2026CVE-2026-20223 is assigned a maximum CVSS base score of 10.0. The vulnerability allows remote, completely unauthenticated threat actors to cross isolated tenant boundaries and gain full co ... Read more
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CybersecurityNews
Critical Cisco Secure Workload Vulnerability Enables Unauthorized API Access
Cisco has disclosed a critical security vulnerability in its Secure Workload platform that could allow unauthenticated attackers to gain unauthorized access to sensitive resources via internal APIs. T ... Read more
The following table lists the changes that have been made to the
CVE-2026-20223 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
May. 20, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-306 Added Reference https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-csw-pnbsa-g8WEnuy