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CVE-2026-20223

Cisco Secure Workload authentication bypass

10.0 CRITICALEPSS 0.83%
  1. Published20 May 2026

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. 

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Cisco Secure Workload≥ 4.0 < 4.0.3.17 · < 3.10.8.3

Remediation

Fixed in
Cisco Secure Workload≥ 4.0.3.17

References

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Frequently asked

Is CVE-2026-20223 being actively exploited?

CVE-2026-20223 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.83%.

How severe is CVE-2026-20223?

CVE-2026-20223 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 0.83% probability of exploitation.

Which products are affected by CVE-2026-20223?

Affected products include Cisco Secure Workload.

How do I fix CVE-2026-20223?

Upgrade affected software to a fixed version, for example Cisco Secure Workload 4.0.3.17 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-20223 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.