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VulnerabilityPublished

CVE-2026-20223: Cisco Secure Workload · Missing Authentication

Affects Cisco Secure WorkloadSource CVE Database V5

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Not known to be exploited · CVSS 10.0 Critical.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
10.0Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.8% chance of exploitation in 30 days – higher than 57% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
CiscoCisco Secure WorkloadAffected
  • 1.102.21 – 4.0.3.13
99 affected builds
Fixed in–

AI-suggested

Until a fix is available, restrict access to Cisco Secure Workload management interfaces and internal APIs to trusted networks and authenticated users only. Monitor for unusual API activity and consider implementing network-level controls to limit exposure.

Description

CVE-2026-20223 is a critical vulnerability in Cisco Secure Workload affecting multiple versions. It involves missing authentication on internal REST API endpoints, allowing unauthenticated remote attackers to access site resources with Site Admin privileges. Exploitation could lead to unauthorized reading of sensitive information and configuration changes across tenant boundaries. The vulnerability is due to insufficient validation and authentication of API requests. There is no confirmed patch or official remediation guidance available at this time. The vulnerability has a CVSS score of 10.0, indicating critical severity. No known exploits in the wild have been reported so far.

References

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